leaf fall

基本解释

An aspen leaf turning fall colors.
白杨树的树叶转变为秋天的颜色。
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？
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。

For the first row nearest the fans, they generally suggested trees that lose their leaves in the fall or trees with waxy leaf surfaces.
the fall of the yellowed,dry leaf.

Premature leaf fall would thus be a bad thing.
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