But the most formidable challenger is the humble downy birch.

但最强大的挑战者是不起眼的绒毛桦树。

So was I once myself a swinger of birches.

当年，我自己也是“荡桦树”的能手。

The tiny, yellow birch leaves are rustling.

小小的黄桦树叶沙沙作响。

Would not have bandy children, nor fasting, nor birch.

就不会有弯腿的孩子、不禁食也不打人。

I quickly made a bed of boughs and started a fire with the bark of an old dead birch.

我很快用树枝搭了个床，用枯死的桦树的树皮生火。

Researchers used lasers to scan birch trees in both Finland and Austria.

研究人员用激光扫描了芬兰和奥地利的桦树。

The larches and birches were covered with green, the laburnums with gold.

落叶松和白桦树披上了绿装，金链花金光灿灿。

The logs should from come hardwood trees like maple, oak, poplar or birch.

原木应该来自枫树、橡树、杨树或桦树等硬木树木。

The top of the building is the new home for 75 birch trees.

楼顶栽种了75棵白桦树。

The downy birch detected the current warming trend much earlier than most scientists.

绒毛桦树比大多数科学家更早地发现了当前的变暖趋势。

Her wooden spoons and ladles were all carved from birch.

她的木勺和长柄勺都是用桦木雕刻的。

Leaving the birch forest, we drive north, chasing the Summer Solstice all the way.

离开白桦林我们继续驱车向北，一路追赶着夏至。

He had tried other woods, but found ash too hard, beech and birch thuggish.

他试过其他树林，但发现梣木太硬，山毛榉和桦木太凶狠。

But don't think Wrigley's-this detritus is black, sticky tar distilled from birch bark.

但不要以为那是箭牌口香糖——这种残余物是从桦树皮中蒸馏出来的黑色粘性焦油。

The native Wabanaki people arrived there in boats made from the wood of birch trees.

当地的瓦巴纳基人乘坐用白桦树木制成的船只抵达那里。

Trees like paper birch white or silver poplar, acacia and eucalyptus light up the night.

白色的纸桦树或银色的白杨树、金合欢树和桉树等树木点亮了夜晚。

Ancient gums were made from local plants like birch bark tar used for Finland's wad.

古代的口香糖是由当地的植物制成的，比如说芬兰口香糖使用的白桦树皮焦油。

The plant DNA painted a picture of forests dominated by poplar and birch trees.

植物DNA描绘了一幅以白杨树和白桦树为主的森林图景。

I put the last of my birch bark on the fire and fanned it into life.

我把剩下的桦树皮全部放进火堆里，然后扇火使它再次燃烧起来。

Then we have the hard wood called oak, and the pretty dark-red mahogany, and the yellow birch.

还有比较硬的木材。硬木里有橡木, 英语叫oak；还有漂亮的暗红色的红木, 英语叫mahogany；还有黄色的桦木, 英语叫birch。