leaf是可數名詞

　　例句：

　　September had come and the leaves were starting to fall.

　　已到九月了，樹葉開始凋落。

　　They found the body buried beneath a pile of leaves.

　　他們發現尸體被埋在一堆樹葉下面。

　　Remove dead leaves to encourage new growth.

　　去掉枯葉以促進新葉生長。

　　He will be difficult to replace when he leaves.

　　他離開后，他的.位置很難有人接替。

　　Clear away leaves and other garden debris from the pond.

　　把池塘里的樹葉和其他庭園垃圾清除干凈。