up的用法及短语?
1-PHRASAL VERB (在参考书、列表等中)查检(事实或信息) If you look up a fact or a piece of information, you find it out by looking in something such as a reference book or a list. 2-PHRASAL VERB 拜访,探访,看望(久未见面的人) If you look someone up, you visit them after not having seen them for a long time. 3-PHRASAL VERB 改善;好转 If a situation is looking up, it is improving.
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