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1·The budget crisis has forced the president to go back on his word.

预算危机已迫使该总统背离了自己的承诺。《柯林斯英汉双解大词典》

2·He kept asking me to let him go back on the board for the next seven days.

在接下来的七天里，他一直要求我让他回到冲浪板上。

3·You've always been fair and square with me, Muff Potter, and I won't go back on you.

莫夫·波特，你一向待我很公平，我不会背叛你的。

4·Don't go back on your word.

可别说了又变卦啊！《新英汉大辞典》

5·I give you my word and I'll never go back on it.

一言为定， 决不反悔。《新英汉大辞典》

6·He is not the sort of man who would go back on his word.

他不是那种说话不算数的人。《新英汉大辞典》

7·If he promised to help, he will not go back on his promise.

如果他答应帮忙，他就不会食言。《新英汉大辞典》

8·I mean what I say and shall never react from [go back on] my words.

我讲话是算数的，决不反复。《新英汉大辞典》

9·I can not go back on what I said.

我不能背约我所说的话。

10·This is a demand we will not go back on.

这是我们不会放弃的要求。