| 单词 | backflow |
| 例句 | This was to prevent a backflow of contaminated air from coming into the staging room. The Hot Zone 1994-01-01T00:00:00Z This sphincter reflexively opens during swallowing, then closes, providing a seal against backflow from the esophagus into the pharynx. Passing gas is an art and science 2012-08-23T00:00:00Z Most veins have one-way valves called venous valves to prevent backflow caused by gravity. Fundamentals of Biology 2015-01-01T00:00:00Z This deoxygenated blood then passes to the right ventricle through the tricuspid valve, which prevents the backflow of blood. Concepts of Biology 2013-04-25T00:00:00Z They might also trigger backflow valve inspection requirements, such as those required for irrigation systems in many areas. Don't go chasing waterfalls, unless you want a really cool outdoor feature 2023-04-05T04:00:00Z Götherström agrees that repeated backflow is the most likely scenario given the available evidence. Native Americans—and their genes—traveled back to Siberia, new genomes reveal 2023-01-11T05:00:00Z In addition, veins are structurally different than arteries in that veins have valves to prevent the backflow of blood. Biology for AP Courses 2022-06-09T00:00:00Z The semilunar valves close to prevent backflow into the heart. Anatomy and Physiology 2013-06-19T00:00:00Z Veins are not as thick-walled as arteries, since pressure is lower, and they have valves along their length that prevent backflow of blood away from the heart. Concepts of Biology 2013-04-25T00:00:00Z She has bricks to stand heavy furniture on if there is a flood warning, as well as freestanding pumps and sandbag substitutes ready, and even a toilet bung to prevent backflow. 'Flooding meant I could only reach my home by boat' 2022-04-13T04:00:00Z Arlington's drinking water supply was not affected, and that the splash pad is equipped with a backflow prevention device designed to isolate its water from the city's water distribution system. Child dead after infected by rare brain-eating amoeba found at Texas splash pad 2021-09-27T04:00:00Z Both veins and arteries have valves to prevent the backflow of blood. Biology for AP Courses 2022-06-09T00:00:00Z After chyme passes through, backward pressure helps close the sphincter, preventing backflow into the ileum. Anatomy and Physiology 2013-06-19T00:00:00Z City officials say Arlington’s drinking water supply was not affected, and that the splash pad is equipped with a backflow prevention device designed to isolate its water from the city’s water distribution system. Boy dies from brain-eating amoeba found at Texas splash pad 2021-09-27T04:00:00Z Charcoal and pieces of rock from the ensuing tsunami’s backflow were discovered, although sulfur was notably absent, according to researchers. Day the dinosaurs died: Asteroid impact site reveals devastation from power of 10 billion A-bombs 2019-09-10T04:00:00Z The Richmond Times-Dispatch reports that Louisa town and county officials on Tuesday said the methane gas entered through traps in drains that typically prevent the backflow of methane. Virginia town: Methane from sewer system contaminated water 2018-12-12T05:00:00Z Both veins and arteries have valves to prevent the backflow of blood. Biology for AP Courses 2022-06-09T00:00:00Z At the base of the pulmonary trunk is the pulmonary semilunar valve, which prevents backflow of blood into the right ventricle during ventricular diastole. Anatomy and Physiology 2013-06-19T00:00:00Z It occurs when a muscle in the esophagus doesn’t close properly, allowing the backflow of stomach contents. She’d lost a lot of weight and had trouble swallowing. Was she dying? 2018-03-16T04:00:00Z But the team also found vestiges of the ‘backflow’ migration in West Africans and in a pygmy group in Central Africa, the Mbuti. Report that much of Africa has Eurasian ancestry is mistaken 2016-01-28T05:00:00Z They work in what is called “backflow” – extracting excess fluid from wells. Timmy Smith: the rise, fall and rise of the Super Bowl’s most mysterious legend 2016-01-27T05:00:00Z The damage to his heart meant one of his heart valves no longer worked properly, creating a backflow of blood and putting extra strain on his heart. Balloon 'last chance treatment' for heart failure - BBC News 2016-01-26T05:00:00Z At the base of the aorta is the aortic semilunar valve that prevents backflow of blood into the left ventricle while the heart is relaxing. Anatomy and Physiology 2013-06-19T00:00:00Z The researchers traced this injection of genes to an event known as the ‘Eurasian backflow.’ Study: Eurasian farmers migrated to Africa 3,000 years ago 2015-10-08T04:00:00Z Andrea Manica, a population geneticist at the University of Cambridge, UK, who co-led the study, says the team made a mistake in its conclusion that the backflow reached western and central Africa. Report that much of Africa has Eurasian ancestry is mistaken 2016-01-28T05:00:00Z There are actually two elevators at the Sessions building, but one of them is closed off because nobody wanted to spend an extra $2,000 for a backflow preventer required by the city water department. Connecticut city hopes to restore centuries-old building 2015-06-07T04:00:00Z One possibility under investigation is a problem known as cross contamination or backflow. Water tests clean, but Mercer Island continues boil alert 2014-10-03T04:00:00Z The two semilunar valves, the pulmonary and aortic valves, are closed, preventing backflow of blood into the right and left ventricles from the pulmonary trunk on the right and the aorta on the left. Anatomy and Physiology 2013-06-19T00:00:00Z Those precautions against backflow would be harder to notice in the sometimes-dim light of the room where the execution workers do their jobs. A Prolonged Execution in Arizona Leads to a Temporary Halt 2014-07-24T04:00:00Z The real danger in Zoar is to the buildings, not the people, corps officials say, because there would be ample time to evacuate the town’s 166 residents as backflow from the dam rose. Aging Levee Puts Village of Zoar, Ohio, on Endangered List 2012-08-28T03:40:51Z Avoiding this requires engineering of the interface to impede the backflow of electrons across the junction. Materials interface engineering for solution-processed photovoltaics 2012-08-15T17:22:03.163Z While backflow in a vein may lead to bulging varicose veins in the future, Rass and colleagues stress that they can't say for certain and recommend more research in the area. Laser for varicose veins no better than surgery 2011-09-19T20:28:49Z Two of these openings are guarded by the atrioventricular valves, the right tricuspid valve and the left mitral valve, which prevent the backflow of blood. Anatomy and Physiology 2013-06-19T00:00:00Z The objection against discharging into seas is the operation of the tides, which cause a backflow and overflow of sewage from the pipes. The Home Medical Library, Volume V (of VI) Mr. Waples sank along the sides of the cave in the swash or backflow, until he arrived at a grand archway of limestone, riven from a mass of slate. Tales of the Chesapeake There is thus a constant backflow of sewage. Scientific American Supplement, No. 483, April 4, 1885 Mr. William, a Weymouth, but not so rich in experience, tried to dam the inevitable backflow of the tide, but with incomplete success. Roads of Destiny A valve associated with this opening prevents backflow of blood during the fetal period. Anatomy and Physiology 2013-06-19T00:00:00Z When interstitial pressure is low, the endothelial flaps close to prevent “backflow.” Anatomy and Physiology 2013-06-19T00:00:00Z |
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