1、quantity本身是名词,一般用形容词来修饰,可者前面直接跟动词.有a small quantity/ a large quantiey /quantities/等用法.没有你讲的直接跟介词一起用的.如:Mathematics is the science of pure quantity.数学是研究纯量之科学。

2、There is a small quantity of water left in the bottle.瓶子里还剩下少量的水。

3、She has quantities of good clothes.她有许多好衣服It was a bad year for films, in terms of both quantity and quality. 今年的电影无论从数量上还是质量上都说不上好。

4、This company is more concerned with quality than with quantity. 这家公司对质量比对产量更重视.A large quantity of air-conditioners has been sold since the temperature is high. 因为气温很高，有大量空调售出。

5、The factory turns out a large quantity of paper products. 这家工厂生产大量的纸制品。

6、The new sales director is still a bit of an unknown quantity. 新来的销售部主任大家还不大了解。