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171页（228字）
比喻玩弄手段或反复无常，例这些政客最善于翻云覆雨，敌友之分完全取决于利害关系。
These politicians are“experts”at never keeping their word and as for so-called friends．they are picked according to who is of use to them．