东汉末年,备受曹操器重的刘一,因其弟谋害曹操,本应抄斩全家,刘却得到曹操宽恕,于是给曹写了一封书信说,我本有灭族大罪,承蒙您“扬汤止沸”,“使不焦烂”,解救了我一时急难,我永远报答不了您的大恩大德。“扬汤止沸”,其本意是把开水从锅里舀出来再倒回去使它不再沸腾,比喻办 In the late Eastern Han dynasty, Liu Yi, who was greatly rewarded by Cao Cao, was supposed to cut his whole family because of his brother’s murder of Cao Cao. Liu was given Cao Cao’s forgiveness and wrote a letter to Cao saying that I had a great sin of genocide, Stop boiling “,” so that does not scorching, “saved me in a hurry, I will never repay your greatness. ”Yang Tang Zhi Bo", its purpose is to scoop boiling water out of the pan and then back to make it no longer boil, metaphor