leaf的意思是：n.叶叶片叶子有…状叶的有…片叶的(纸)页，张(尤指书的)页薄金属片活动桌板。v.翻…的页，匆匆翻阅。
例句： leaves on the plant had shrivelled up from lack of water.
因为缺水，植物的叶子已经枯萎了。
2、The leaves of certain trees are poisonous to cattle.
某些树的叶子会毒害牲畜。
3、When she leaves school， she wants to learn a trade.
她毕业后想学一门手艺。
