a (large) number of 若干；许多
a pile of 一堆，许多
a place of interest 名胜
a point of view 观点，着眼点
a (great, large, good, small) quantity of （大，大, 大,小）量的……
a response to 对……回答/反应/答复
a series of 一系列,一连串
a shortage of ……的短缺/缺乏
a (wide) variety of 各式各样的
a waste of ……的浪费
