1、He confessed himself to be unfaithful to his friends.
他承認(rèn)自己對(duì)朋友不忠實(shí)。

2、Eg: it's immoral to be unfaithful to your girlfriend.
對(duì)女友不忠實(shí)是不道德的。

3、I think my spouse may be unfaithful to me.
我覺(jué)得我的愛(ài)人或配偶可能會(huì)不忠于我。

4、God told Hosea to find a wife, and told him ahead of time that she would be unfaithful to him.
上帝吩咐何西阿娶一妻子，并且事先告訴何西阿他的妻子將對(duì)他不忠。

be unfaithful to翻譯