三下五除二sān xià wǔ chú èr常用成语 基本例句 at one goneat and quick珠算口诀。形容做事及动作干脆利索。近义三下两下他三下五除二地冲净了带有斑点的鱼鳞以及里面鲜红的鱼肉，然后把鱼包裹在纸里，再放进一个塑料袋。 He rinsed the flecked mesh of scales and the red flesh inside, then wrapped the fish in paper and put it in a plastic bag. yeeyan