成语名称:乘虚而入:advance when the emeny\'s defences are weak英语: advance when the emeny\'s defences are weak乘虚而入造句:1、如果不注意清洁卫生,细...
成语名称:病入骨髓:sick beyond cure(past all hopes)英语: sick beyond cure(past all hopes)成语近义: 病入膏肓(bìng rù gāo huāng):膏肓:我国古代医学名称;...