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1、a amount of +不可名, "大量的..." the amount of +不可名, "..的数量" the number of+可名复, "...的数目/数量" a number of+可名复," 许多,一些,若干..." 如: The amount of rainfall determines the quality of the crop. 降雨量决定着收成的好坏. A billion dollars is a amount of money. 百万美元是一笔庞大的资金. I visited a number of scientific institutes in Asia. 我访问了亚洲的许多科学协会. The number of students of this school has shrunk. 这所学校的学生人数在减少.。

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