The microscope images showed that the cortex of thicker hair tends to snap when broken, leaving a clean, even break.

显微镜图像显示，较粗毛发的皮层在被折断时时容易断裂，留下干净平整的直茬。

At length the paddle broke, leaving the useless handle in his hand.

最后桨断了，只剩下他手里没有用的手柄。

Her gut has developed a special system of pouches to separate food in various stages of digestion, and it hosts specialised bacteria that break down the leaves.

它的肠道已经形成了一个特殊的肠袋系统，来分离不同消化阶段的食物，体内还寄生着专门的细菌来分解树叶。

Eucalyptus leaves are poisonous to most animals, but koalas have an extra-long digestive system that allows them to break down the leaves without being hurt by the poison.

桉树叶对于大部分动物来说是有毒的，但考拉拥有超长的消化系统，这让它们能够轻松分解树叶而不被毒性所伤到。

I also learned that the earthy smell underfoot in the forest - the one that makes you feel like, hell yeah, I'm in nature - that comes from insects, bacteria and fungi breaking down leaves and rotten wood.

我还了解到，森林中脚下的泥土气味——让你感觉，是的，我就在大自然中——来自昆虫、细菌和真菌分解树叶和腐烂的木头。