一、使用场合不同
二、含义不同
1.an amount of释义：总量；数量。
2.the amount of释义：······的数量。
三、用法不同
1、an amount of接可数名词。
例句：Escrow is a way of keeping an amount of money safe while a legal transaction is going on.
2.the amount of后可接不可数名词和可数名词。
例句1：Think twice before eating those dropped crumbs off your computer keyboard, according to a new study on the amount of germs on keyboards.
