look sth up

look up sth还是look sth up look sth up look up sth.和look up at sth.的区别 第二小题可以填 look up么?有look up sth的么? 英语look up sth.可以用于电话簿信息吗? 用nervous look up from sth turn extra写段 look sth. 在一些固定搭配,如：pick up sth,look up sth等,哪些是可以变成如pick up sth这样的,怎么 look up和look look up the dictionary and find sth 有这么说的吗? stay up,look up , look for sth 不是look sth for