词源:

quant 数量 + ity 构成名词，表示性质 -> 数量 -> quantity 数量

n. 量，数量；大量；总量

Is it available in sufficient quantity?

这东西能不能足量供应？

Prices vary according to the quantity ordered.

价格根据所订数量而变化。

I just can't even conceive of that quantity of money.

我简直无法想像那样一笔数量的钱。

The case contained a large quantity of U.S. dollar bills.

盒子里装有大量美钞。