落叶英语的翻译是fallen leaves，来源于叶子在树上枯萎并脱落到地面的现象。

例句：

The ground was covered in fallen leaves. (地上遍布落叶。)

The wind blew and more leaves fell from the tree. (风吹起，更多的叶子从树上掉落下来。)

The fallen leaves crunched under our feet as we walked. (我们走着，落叶在我们脚下发出碎裂声。)