落井下石
书籍：汉英成语词典
更新时间：2018-12-03 21:46:46
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167页（294字）
比喻趁人有危难时加以陷害，例他平时呼朋唤友，可是一旦友人有了急难，不但不救，反而落井下石。
When all is going well，he never hesitates to call on his friends for help．When a friend falls on hard times，however，he makes no attempt to help him but drops so low as to take mean advantage of him．