| 单词 | go back on／upon |
| 释义 | go back on／upon fail to keep（a promise，an agreement，etc．）；fail to be loyal to违约；背弃 *Never go back on your friends．绝不要背弃你的朋友。 *He's not the sort of man who would go back on his word．他不是那种不守信的人。 *When you make a promise，you must not go back on it．当你许下诺言时，就不可食言。 *I'm afraid that I will have to go back on my word for I am now hopelessly ill in bed．恐怕我要食言了，因为我现在重病在床。 |
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