1·Have you ever been unfaithful to him?
你对他是否有过不忠行为？
—— 《牛津词典》
2·He vowed to wreak vengeance on his unfaithful, thieving wife.
他发誓要报复对自己不忠、爱偷东西的妻子。
—— 《柯林斯英汉双解大词典》
3·She was shocked by the discovery that he had been unfaithful.
她发觉他不忠时感到非常震惊。
—— 《牛津词典》
4·She wondered if Harry had been unfaithful to her during this long separation.
她想知道，在分开的漫长岁月里哈里是否已经对她不忠了。
—— 《柯林斯英汉双解大词典》
5·He's not the type to be unfaithful.
他不是背信弃义的那种人。
—— 《牛津词典》
6·James had been unfaithful to Christine for the entire four years they'd been together.
詹姆斯在与克里斯蒂娜一起的整整4年里一直是不忠的。
—— 《柯林斯英汉双解大词典》
7·I was unfaithful. I had affairs.
我对妻子不忠，我有外遇，我欺骗了她。
8·Meaning: "Your wife is unfaithful"!
意思：你老婆给你戴了绿帽子！
9·"Were you ever unfaithful to me?" I asked.
我问她：“你有没有对我不忠呢？”
10·I've been unfaithful to you three times.
我对你有三次不忠。
1·He vowed to wreak vengeance on his unfaithful, thieving wife.
他发誓要报复对自己不忠、爱偷东西的妻子。
—— 《柯林斯英汉双解大词典》
2·James had been unfaithful to Christine for the entire four years they'd been together.
詹姆斯在与克里斯蒂娜一起的整整4年里一直是不忠的。
—— 《柯林斯英汉双解大词典》
3·Indeed, he was a lucky man, Teacher Fei said now; he had never married, so no one could accuse him of being an unfaithful husband or a bad father.
确实，他是个幸运的人，范老师现在说，他从来没有结过婚，所以也没有人会来把他说成一个不忠的丈夫和坏父亲。
4·In the old days, men could have many wives but women were tortured and beaten if they were discovered being unfaithful to their husbands.
在古代，男人可以有很多妻子，但是如果女人被发现对自己的丈夫不忠，就会遭到虐待和毒打。
5·If you mingle with Asian girls that frequent the clubs for any length of time, you will eventually meet ladies who are unfaithful.
如若你把亚洲女孩当作是那种经常出入酒吧的不良女人时，你可能最终会遇到一些不忠的女人。