amount/amounts

这是一个应当注意的惯用法问题。不可数名词不能与 number 连用(× a large number of money)，而必须与 amount 连用(a large amount of, large amounts of)。但是，amount 本身却是个可数名词，因此，large amounts of money 的说法是符合惯用法的。

1. He must often memorize large amounts of material. (AOT) 他必须经常熟记大量材料。

2. Vast amounts of money are being invested in the local market. (TOEFL) 大量资金投放在当地市场上。