| 单词 | duckweed |
| 例句 | The structure feels perilously thin, suspended over an artificial pond choked with two decades of duckweed. The xx: Night + Day – review 2013-05-22T08:00:02Z Water lilies and duckweed turned the water green near the mouth of Monument Brook. On a Canoe Trip Along the U.S.-Canada Border, Solitude and Shooting Stars 2018-06-20T04:00:00Z Soon, his team will start to sequence duckweeds from different generations and assess their gene activity to see how gene regulatory networks might differ between the polyploids and diploids. Cells with extra genomes may help tissues respond to injuries—and species survive cataclysms 2023-08-23T04:00:00Z As part of their environmental science class, high school juniors and seniors were building a natural filtration system to clear out duckweed, prevalent in the wetlands they are working to restore. National honors go to 2 WA schools for environmental innovation 2023-05-12T04:00:00Z Department of Energy’s Brookhaven National Laboratory, says further research could double the engineered duckweed’s oil output in the next few years. This Common Aquatic Plant Could Produce Buckets of Biofuel 2023-01-25T05:00:00Z Scientists are hoping duckweed and slurry could help farmers "make money from muck". Aberystwyth University: Duckweed could feed cows and save rivers 2022-12-30T05:00:00Z Ms Paley describes recent innovations in protein sources, including from algae, aquatic plant duckweed, the black soldier fly, and lab-grown meat. Would you switch your dog to eating lab-grown meat? 2022-12-11T05:00:00Z A warmer, calmer climate awaits just a few doors away in the warm tropics, where aquatic plants like duckweed, water poppy and lotus dance on the surface of a tank. Inside UW’s new greenhouse and its rare and exotic collection 2022-10-29T04:00:00Z Some duckweeds are the smallest flowering plants in nature. One of Nature’s Smallest Flowering Plants Can Survive Inside of a Duck 2018-12-14T05:00:00Z Scientists have figured out how to coax copious amounts of oil from duckweed, one of nature’s fastest-growing aquatic plants. This Common Aquatic Plant Could Produce Buckets of Biofuel 2023-01-25T05:00:00Z "Native duckweeds can make slurry a valuable resource," he said. Aberystwyth University: Duckweed could feed cows and save rivers 2022-12-30T05:00:00Z "We will grow duckweed as an animal feed, too," says Ms van Wingerden. The world's first floating farm making waves in Rotterdam 2018-08-16T04:00:00Z With the incredible diversity of flowers that exist today—from pinprick-sized duckweed to the meters-high blooms of a corpse flower—it’s hard to imagine that they all descend from just a single species. The world’s first flower may have looked like this 2017-08-01T04:00:00Z They placed duckweeds salvaged from three separate birds’ feces in Petri dishes and waited to see whether they would grow. One of Nature’s Smallest Flowering Plants Can Survive Inside of a Duck 2018-12-14T05:00:00Z For a new study in the Plant Biotechnology Journal, researchers genetically engineered duckweed plants to produce seven times more oil per acre than soybeans—currently the most commonly used biodiesel-producing plant. This Common Aquatic Plant Could Produce Buckets of Biofuel 2023-01-25T05:00:00Z By growing duckweed on the farm, waste nitrogen and phosphates are taken out of the water, cleaning it and meaning it could potentially be safely released. Aberystwyth University: Duckweed could feed cows and save rivers 2022-12-30T05:00:00Z Floating vegetation – likely duckweed – was swirling in the Venezuelan lake when Nasa’s Aqua satellite flew over in February 2017. Satellite eye on Earth: February 2017 – in pictures 2017-03-21T04:00:00Z Huge blooms of noxious duckweed look, from above, like pea-green wigs spread out in the sun. Venezuela, A Failing State 2016-11-06T04:00:00Z If the duckweeds spent days in the bird, for instance, they might not still be viable when they emerge. One of Nature’s Smallest Flowering Plants Can Survive Inside of a Duck 2018-12-14T05:00:00Z Second, duckweed can thrive in agricultural pollution from, say, pig and poultry farms—potentially cleaning up some of the nitrogen and phosphorus such farms release into the water. This Common Aquatic Plant Could Produce Buckets of Biofuel 2023-01-25T05:00:00Z The nutrients in the waste water also lead to quicker growth of the duckweed which could be used as a protein-rich feed for livestock. Aberystwyth University: Duckweed could feed cows and save rivers 2022-12-30T05:00:00Z After the use of the chemical diquat, the duckweed turns brown and sinks to the bottom, which can nourish unkilled weeds, effectively making matters worse. A Green Way to Clean Ponds But after watching a bale of red-eared sliders gliding through the duckweed at Turtle Pond, one of the students noticed a similar-looking turtle, but without telltale red stripes. Canvassing Central Park and Finding New Tenants 2013-08-28T02:47:19Z She called the center Fuping Health Workshop; fuping is Chinese for duckweed, a plant known for remaining strong and vital while continuously floating, a characteristic she says sex workers also have. China’s Sex-Worker Warrior 2012-07-31T08:45:00Z From the sluggish water at the side, iris and bog-bean stood nobly up, and white-lilies floated on the still surface in lordly pride among the humbler wrack and scum of duckweed and water buttercup. The Suprising Adventures of Sir Toady Lion With Those of General Napoleon Smith 2012-04-03T02:00:29.527Z Until now, the project has studied the growth of duckweed in laboratories and in tanks on land owned by the universities. Aberystwyth University: Duckweed could feed cows and save rivers 2022-12-30T05:00:00Z The sun sparkled on the moving duckweed of the canal. The Literary Sense 2012-04-02T02:00:28.147Z Whatever the jest might be, it did not appeal to the chauffeur, who withdrew in silence to his motor, coldly wiping the vicarious duckweed from his knees with a silk pocket-handkerchief. Further Experiences of an Irish R.M. 2011-11-24T03:00:44.527Z It was as if the beak of a bird, the body and most of the head quite hidden and under water, were picking or feeding among the duckweed. Wild Life in a Southern County 2011-08-04T02:00:27.037Z Polyps may be obtained at all times of the year by bringing home duckweed, conferva, and other water-plants from the ponds. Marvels of Pond-life A Year's Microscopic Recreations 2011-08-01T02:00:12.067Z The majority of them were attached to bricks, but some were on the roots of duckweed, the stems of water-plants, and the tips of creepers falling into water. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z Elsewhere we encountered deep pools covered with water lilies and duckweed. Abb? Aubain and Mosaics 2011-01-21T03:00:12.617Z She gathers fast the large duckweed, From valley stream that southward flows; And for the pondweed to the pools Left on the plains by floods she goes. The Wisdom of Confucius with Critical and Biographical Sketches After waiting some time, and wondering what had become of the bird, I fancied I saw some duckweed slightly agitated. Wild Life in a Southern County 2011-08-04T02:00:27.037Z We may also imagine the duckweed reproving the pine for his extravagance in the matter of pollen production. Springtime and Other Essays Biology.—The zoaria of S. indica are usually fixed to the roots of duckweed or to the stems of other plants. Freshwater Sponges, Hydroids & Polyzoa 2011-06-25T02:00:17.833Z The plant mentioned by Malte-Brun is probably the Pistia Stratiotes, a floating plant, related to English duckweed, but very much larger. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology Here long, there short, afloat the duckweed lies; But caught at last, we seize the longed-for prize. The Wisdom of Confucius with Critical and Biographical Sketches Ours now the duckweed from the stream we bear And cook to use the other viands rare. Oriental Women In one corner there is a small pond, muddy, stagnant, covered with duckweed, perhaps reached by a steep, 'pitched' descent, slippery, and difficult for the cattle to get down. The Hills and the Vale Now, you may either see in the water the reflection of the sky, or you may see the duckweed; but you cannot, by any effort, see both together. Modern Painters Volume I (of V) The supplies in the granaries were, however, hardly needed: the winter was exceptionally mild, and the voles were generally able to obtain duckweed and watercress for food. Creatures of the Night A Book of Wild Life in Western Britain Ours now, the duckweed from the stream we bear, And cook to use with other viands rare. The Wisdom of Confucius with Critical and Biographical Sketches The waters of the moat, being tranquil, and overgrown with duckweed, would surely prove more hospitable than the surging ocean, and ought to support a raft, of however amateur a description. The Madcap of the School "But her hair turned as green as duckweed, and was always having to be colored up." Fairy Tales of Hans Christian Andersen Go to the edge of a pond, in a perfectly calm day, at some place where there is duckweed floating on the surface,—not thick, but a leaf here and there. Modern Painters Volume I (of V) As the otter, inquisitively following the line of the scent, came to the ponds, she heard the croaking of countless frogs hidden in the duckweed that lay over the entire surface of the water. Creatures of the Night A Book of Wild Life in Western Britain See how the duckweed's stalks, or short or long, Sway left and right, as moves the current strong! The Wisdom of Confucius with Critical and Biographical Sketches Let us take our way to some pond or lake, thick with duckweed and beloved of wild fowl, and we shall find a different state of affairs. The Log of the Sun A Chronicle of Nature's Year In this way seeds of water plantain, sedges, grasses, rushes, docks, arrowhead, pondweeds, duckweed, cat-tail flag, bur reed, bladderwort, water crowfoot, and many others are transported from one pond, lake, or stream, to another. Seed Dispersal Mud and duckweed covered her boots, several dirty marks were made on her frock, the parcel fell out of her hand, and probably the black stains on the paper had penetrated to the contents. Littlebourne Lock Not in the least disheartened, he climbed the rabbit-track, rustled over the hedge-bank to the margin of the pond, and there, as in the nights before the frost, feasted eagerly on duckweed and watercress. Creatures of the Night A Book of Wild Life in Western Britain Their faces would have made a study for a comic artist, especially Diana's, with smears of duckweed on her cheeks, and her moist hair hanging over her shoulders. A harum-scarum schoolgirl On the 4th November they saw patches of duckweed and a seal, and inferred their vicinity to land. The History of Tasmania, Volume I This brown and liquid cross was spotted by duckweed, which the swan displaced as he swam. En Route You see a small creature sticking to the stem of a bit of duckweed; around its mouth are five or six little projections. Country Walks of a Naturalist with His Children A freshwater Hydra, growing on the duckweed usually multiplies by budding. The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told There she stood upon the bank a dripping object, her nice dress all coated with duckweed and green slime. A harum-scarum schoolgirl On the broad canals innumerable barges and sloops and motor-boats were leisurely passing, and on the little side-canals and ditches which drained the fields the duckweed spread its pale-emerald carpet undisturbed. Fighting For Peace I recommend all country folk who come up to town in summer time to run down here just to see duckweed cultivated once in their lives. Nature Near London A current sweeps round this islet Kiséngé from N.E. to S.E., and carries trees and duckweed at more than a mile an hour in spite of the breeze blowing across it to the West. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873 Continued By A Narrative Of His Last Moments And Sufferings, Obtained From His Faithful Servants Chuma And Susi One of the streams, the Lonzua, drives a smooth body of water into the Lake fifty yards broad and ten fathoms deep, bearing on its surface duckweed and grassy islands. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 Many of the craters half-filled with water already had duckweed growing. Fanny Goes to War Behind them was a broad ring of stagnant water covered with duckweed. Combed Out I turn down by the river; in the ditch at the foot of the ha-ha wall is plenty of duckweed, the Lemna of the tank. Nature Near London The river is rising fast, and bringing down large quantities of aquatic grass, duckweed, &c. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume II (of 2), 1869-1873 Continued By A Narrative Of His Last Moments And Sufferings, Obtained From His Faithful Servants Chuma And Susi Waterlilies and duckweed are not the chief part of this floating mass. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 Other good kinds are hornwort, water starwort, tape grass, water poppy, milfoil, willow moss, and floating plants like duckweed. Outdoor Sports and Games I shall give him an aquarium of his very own in a green finger-glass, with nothing but a little very nice duckweed, and one small snail to keep it clean, like a general servant. Brothers of Pity and Other Tales of Beasts and Men One beautiful Chara, which might disclose the secret, had I good glasses, it is a most graceful pellucid form, an undescribed duckweed, a floating Marchantiaceæ. Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Neighbouring Countries There is a large pond in the midst of the garden, covered with duckweed, and full of beautiful gold and silver fish of many kinds. A Voyage in the 'Sunbeam' Our Home on the Ocean for Eleven Months There is a great deal of vegetation in Pamalombé, gigantic rushes, duckweed, and great quantities of aquatic plants on the bottom; one slimy translucent plant is washed ashore in abundance. The Last Journals of David Livingstone, in Central Africa, from 1865 to His Death, Volume I (of 2), 1866-1868 The dervishes took matters very calmly; the desire to play for Biffen's was not strong enough to counterbalance the natural shrinking from a header into the duckweed and a run home in wet clothes. Acton's Feud A Public School Story In the pale light that glided through the hole, he saw the marble woman lying amidst the reeds and the duckweed. Abbe Mouret's Transgression A little brook coursed merrily among the duckweed, the path that ran along its bank was shaded by tall beeches. The Downfall The dandelion, the buttercup, duckweed, celandine, mullein, burdock, yarrow, whiteweed, nightshade, and most of the thistles,—these are importations. The Atlantic Monthly, Volume 07, No. 42, April, 1861 And next morning they found him dead with his neck broken in the bottom of the stone pit, with his beautiful clothes a little bloody and foul and stained with the duckweed from the pond. The Door in the Wall and Other Stories It was Liu Ling," prompts the White Logic, "who declared that to a drunken man the affairs of this world appear but as so much duckweed on a river. John Barleycorn Hence Crabbe delighted to load himself with grasses and duckweed, and Goëthe to fill his carriage with every variety of plant and mountain flower. Poetical Works of Akenside "This," replied Belinda, "is what 'Th'unlearned, duckweed—learned, lemna, call; and it is to be found in any ditch or standing pool." Tales and Novels — Volume 03 She gathers the large duckweed, By the banks of the stream in the southern valley. The Shih King From the Sacred Books of the East Volume 3 The tiling was splendid; from the brilliant firework of the old pump itself, to the figure of Perpendicular dripping with duckweed, like an insane river-god, it was unequalled. Charles O'Malley, The Irish Dragoon, Volume 2 I stayed by a large pond to look at the shadows of the trees on the green surface of duckweed. The Open Air I half promised Craven the other day," he lied, resolutely ignoring her unkind comparison of his protege to the abomination which is too often veiled with duckweed, "to contrive another meeting between you and him. December Love Pink lychnis flowers behind the withy stoles, and little black moorhens swim away, as you gather it, after their mother, who has dived under the water-grass, and broken the smooth surface of the duckweed. The Life of the Fields At the turn lay the pond with yellow duckweed and a bent iron railing that divided it to keep the cows from crossing. A Prisoner in Fairyland Dear Cecil Cavendish, our gifted friend, slight of limb and soft of voice, has been rusticated for immersing four bricklayers in that green receptacle of stagnant water and duckweed, yeleped the "Haha." Charles O'Malley, The Irish Dragoon, Volume 2 She found him seated on a wheelbarrow by the pond, chucking pebbles into the still black water, and disturbing the duckweed on the surface. The Young Step-Mother "No, it was in the deep pool under the weeping willow, where the duckweed grows so rank in summer," said Carey. Henrietta's Wish Or, Domineering I have longed to possess a pond, screened from the indiscretion of the passers by, close to my house, with clumps of rushes and patches of duckweed. The Life of the fly; with which are interspersed some chapters of autobiography Out of this lagoon, and by this stream, the chief part of the duckweed of the Shiré flows. A Popular Account of Dr. Livingstone's Expedition to the Zambesi and its tributaries And of the Discovery of Lakes Shirwa and Nyassa, 1858-1864 In the stagnant waters of our grassy ditches, the flat shells, the humble Planorbes, sometimes no bigger than a duckweed, vie with the Ammonite and the Nautilus in matters of higher geometry. The Life of the Spider |
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