1·You see a leaf fall and you think you know which way the wind blows.
你看到一片树叶落下你以为你就能知道风往哪吹？
2·In plants, leaf fall and flowering are common responses to seasonal changes in day length.
在植物中，落叶和开花是对日长季节性改变的普遍反应。
3·Soon, a leaf fall, cover the body in the small insects, worms suddenly felt incredibly hard, that the devil came, wanted to eat it, scared cold sweat.
不一会儿，一片树叶落下来，盖在了小虫子的身上，虫子顿时感到天昏地暗，以为魔鬼来了，想吃了它，吓得直冒冷汗。
4·Buck scrapes are generally created after leaf-fall in autumn, which is just before or during the rut.
雄鹿窝通常出现在秋天落叶之后，也就是发情之前或发情期间。
5·The weakened fall leaf then becomes vulnerable to the highly destructive effects of the oxygen created by the excited chlorophyll molecules.
活跃的叶绿素分子产生的氧气破坏性强，秋天衰弱的树叶随后变得更容易受到影响。
6·Do you ever wonder why a fall leaf changes color?
你们有没有想过为什么落叶会变色？
7·Moreover, the problem of oversensitivity to light is even more acute in the fall, when the leaf is busy preparing for winter by dismantling its internal machinery.
此外，对阳光过度敏感的问题在秋天更为严重，因为此时叶子正忙着通过“拆卸内部机构”为冬天做准备。
8·Outside, leaf shadows twist and fall like embers.
外面，树叶的阴影扭曲着下降，像余烬一般。
9·The leaves are beginning to fall, and soon only two things will be hanging from the trees: the last leaf and the first football coach.
叶子们开始飘落，不久就只会有两个东西还悬在树上：最后一片叶子和第一个足球教练。
10·An aspen leaf turning fall colors.
白杨树的树叶转变为秋天的颜色。