a bit of 有一点:There is a bit of a scholar.这里有一点墨水
a few of 有些:A few of them know it.他们当中有少数人知道那件事.
a kind of 一种:This is a kind of oil.这是一种油
a little of:Know a little of everything.什么都懂一点
a lot of:She plays a lot of sport.她经常运动.
a pair of:He wears a pair of shorts.他穿着一条短裤
a number of:A number of people disagreed.有几个人不同意.
a piece of :It is a piece of cake.这是件轻松愉快的事
a set of 一套:He has a set of ugly furniture.他有一套难看的家具.