As the birds gain more experience building nests, they drop grass less often, suggesting that they improve at their art.

由于鸟在筑巢过程中取得了更多的经验，经常只会掉下很少的草，表明它们正在不断地改善作巢技巧。

youdao

You cannot prevent the birds of sorrow from flying over your head, but you can prevent them from building nests in your hair.

你无法阻止鸟儿在你的头顶飞翔，但你可以阻止它们在你的头发上做窝。

youdao

The birds are busy building their nests.

小鸟们在忙着搭窝。

youdao

Joseph Garner, of Stanford University, thinks the answer is to keep the labs cool, but let mice cope with the low temperatures as they do in their natural habitat: not by eating more but by building nests.

ECONOMIST: ��and they may return the favour