before you can say knife 1 . (非正式)极快地,立刻 (that) one could cut with a knife 2 . (口音,气氛)非常明显的 get (或 stick) the knife into (或 in) someone 3 . (非正式)加害某人,跟某人过不去 go (或 be) under the knife 4 . (非正式)做手术 the knives are out for someone 5 . (非正式)(对某人)剑拔弩张 like a hot knife through butter 6 . 轻而易举;势如破竹 twist (或 turn) the knife (in the wound) 7 . 故意让人更加痛苦,揭人疮疤 习惯用语 under the knife【非正式用语】 1 . 进行外科手术