betray
单词辨析：
主要指不忠于誓约或辜负信任；也可以指有意泄露秘密或出于无意暴露隐蔽的事物。
He betrayed his country.
他背叛了祖国。
She betrayed the secrets of her company.
她泄露了公司的秘密。
A visible antler behind the tree betrayed the presence of the deer.
树后面露出的角暴露了鹿的藏身之地。
尤指对配偶或性伴侣不忠。
His wife has no idea that he has been cheating on her all along.
他的妻子不知道他一直对她不忠。
He claims that almost half of the women there cheat on their partners.
他声称那里的妇女几乎有一半对自己的伴侣不忠。
主要指向掌权者告发某人，也指违背所作的承诺，常后接介词 on。
They tried to find out who had ratted on them.
他们试图找出是谁出卖了他们。
They accused the local government of ratting on its promises.
他们指责当地政府没有履行承诺。
相关例句：
If you betray us I'll find you wherever you go.
如果你背叛了我们，无论你到哪里我都会找到你。
He nodded his head instead of saying anything where his voice might betray him.
他一言不发，只是点头，因为一开口可能会露出破绽。
And you were the first one to betray us!
你是第一个背叛我们的！
If the world betrayed you, I will standing behind you, betray the world.
如果全世界都背叛了你，我会站在你身后，背叛全世界。
Mary do me wrong to suggest that I would betray her.
玛丽暗示说我会背叛她。她是冤枉我了。
The group were informers, and they betrayed the plan to the Germans.
这帮人是告密者，他们把计划泄露给了德国人。