题目内容：

look it up 和 look up it有什么区别啊怎么用?

优质解答

look up的意思是查阅,查找
例如：Look up the word in the dictionary.
一般代词it要放中间look it up
名词可放中间也可放后面
像look up the word=look the word up
而look up it是错误的用法