[词语]to pay sb. back in his own coin
to pay sb. back in the same coin
[含义]给某人以同样的回敬
[趣释]【物事喻指】 英文金属钱币称为“coin”,西方各国中世纪商业发展很快,钱币的使用越来越频繁,数量(试读)...