quantity
单词辨析：
主要表示某种物质的量。
A large quantity of water is stored in the reservoir.
水库存了大量的水。
We import huge quantities of oil each year.
我们每年进口大量石油。
指把各部分加起来的总数。
Dividends for the year amounted in the aggregate to $50, 000.
该年的红利总计达5万美元。
What is the aggregate of goals from the four football matches?
这4场足球赛的总进球数是多少?
普通用词，主要与表示时间、金钱、物质等的不可数名词连用。
He spent a large amount of time in New York.
他在纽约呆了好长时间。
We need a small amount of fuel.
我们需要少量的燃料。
尤指经常性一次用药的剂量。
You should reduce your daily dosage of the medicine.
你应该减少每天的用药量。
Excessive dosage of this drug can result in injury to the kidney.
这种药使用过量会损害肾脏。
相关例句：
During fever a large quantity of fluid is lost in perspiration.
发烧时，大量水分会通过排汗而丧失。
Cheap goods are available, but not in sufficient quantities to satisfy demand
有一些廉价的商品，但是数量不足以满足需求。
He is an unknown quantity for his rivals.
对于对手们而言，他是个未知数。
Prices vary according to the quantity ordered
价格随订购数量不同而有所变化。
We want not only to increase the quantity of products; but also to ensure the quality.
我们不但要提高产量，还要保证质量。
The exact quantity cannot be determined at present.
确切数量目前尚不能确定。