出处:按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第276页(205字)
很轻易作出答允,但很少遵守信用,例此人向来轻诺寡信,众所周知,你绝不能相信他。
He is known to be a person who promises easily but breaks promises easily too.Do not be taken in by him,I warn you!