upon与over有什么区别?
在某些短语搭配中,upon=on。如:depend on=depend upon(依靠,依赖),look down on sb.=look down upon sb.(看不起某人),而over有超过的意思。如:There are over 50 students in our class. 还有“越过一段时间/距离”的意思。如:The girls are talking over a night. 又如:They paid a visit to me over a mountain.
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