Keep your mouth shut and your ears open.
［译］少说为佳，多听为妙。
Kill not the goose that lays the golden eggs.
［译］杀鸡取蛋，愚蠢荒唐。
Kill two birds with one stone.
［译］一箭双雕。
Kind words are worth much and cost little. (or Kind words go a long way.)
［注解］指言语诚恳好处多。近似于“Mouth civility is no great pains, but may turn to good account”。礼貌语言不费事，作用功效难低估。
［译］口头方便不费力。