Pay sb. (back) in his own coin
1. 以其人之道还治其人之身
He was determined to take revenge; to pay them back in their own coin for the wrongs they had done to him.
他发誓要报复; 他们对他不公, 他要以其人之道还治其人之身。
toss/flip a coin
1. 抛硬币(决定)
Let's toss a coin to decide.
让我们来抛硬币决定吧!
习惯用语pay sb. back in his own coin1.一报还一报， 以其人之道还治其人之身ring a coin1.敲响硬币查真伪spin a coin1.做猜钱币反正面的赌博2.抛钱落地看其反正面以决断问题toss up a coin1.做猜钱币反正面的赌博2.抛钱落地看其反正面以决断问题the other side of the coin1.[喻]事情的另一方面特殊用法altered coin1.变造硬币brass coin1.铜币commemorative coin1.纪念币counterfeit coin1.伪币， 伪铸币current coin1.通货2.流行的话题； 普通的看法damaged coin1.受损硬币effective coin1.硬币false coin1.伪币； 虚假的东西forged coin1.伪造的铸币fractional coin1.辅币gold coin1.小钱light coin1.减重硬币， 分量不足的钱币loose coin1.零钱metallic coin1.金属货币， 硬币minor coin1.低值硬币mutilated coin1.损伤硬币nickel coin1.(美国和加拿大的五分)镍币passable coin1.通用钱币proof coin1.样币standard coin1.本位币subsidiary coin1.辅币worn coin1.残币， 减重硬币