xiaoze2000
IDM是idiom的缩略语，在牛津词典中，代表idiom，即“习语，成语，惯用语”的意思。 例句：Proverbs and idioms may become worn with overuse.谚语和习语会由于使用过多而变得俗套。
郑小包允在
rain cats and dogs (倾盆大雨)a friend in need is a friend indeed (患难见真交）when there is a will,there is a way 有志者，事竟成walls have ears (隔墙有耳)screw one’s courage 鼓起勇气kill two birds with one stone (一石两鸟）feather in cap（炫耀）as close as an oyster 守口如瓶as fresh as an oyster 精力充沛go without saying 不言而喻
