look up中up是什么词

look up中up是什么词 look up;make up;stay up;mix 用法是什么啊 ,look up的意思是什么? look up 的意思是什么? stay up,look up , look over 与 look up区别是什么? look up look up look up look up look up in the dictionarylook up做在字典中查找用,他的同义词是什么 look up和look Put up/Pick up/catch up/look pick up中up 是什么词性 look up it 还是look it up look up sth还是look sth up look up / come up /pick up /take up pick up hold up make up look up