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119页（209字）
比喻有所顾忌，不敢放手去做，例因人质在绑匪手中，使警方投鼠忌器，不敢向匪徒开枪。
Since the hostage was being held by the kidnappers，the police held back from firing in case a mishap should take place