go back on 背信;背弃;出卖;违约;背叛
go back on one's word食言
He never goes back on his word.
他从不食言。
He would rather die than go back on his friends.
他宁死也不出卖自己的朋友。
A:Something must be wrong with Bob recently.
最近Bob有点不太对劲。
B:Yeah,he's in a bad mood,coz some of his friends have gone back on him.
是的,他心情不好,因为他的一些朋友背叛了他。
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