持中的英文：keep within boundskeep是什么意思：v. 保持，处于；继续，重复；使耽搁；抚养；履行n. 生活费，生活必需品That news will keep.那个消息留待以后再宣布。They keep a shop.他们经营一家商店。How are you keeping?你最近还好吧？within是什么意思：prep. 在...里面...阅读全文
出门的英文：be away from homego on a journey参考例句：At home it is always pleasant ;far away from home it is always unpleasant .在家千日好，出门一时难。She thump out of the door to show her anger.她砰砰地走出...阅读全文
