•He was accused of betraying his country during the war.他被指控在战争期间背叛了祖国。

•She felt betrayed by her mother's lack of support.她觉得母亲背弃了她，因为母亲没有支持她。

•For years they betrayed Britain's secrets to Russia.他们持续多年向俄国出卖英国的机密情报。

•formal He promised never to betray her (= never to leave her for another person).他答应永远不离弃她。

•The government has been accused of betraying its election promises.政府因未能履行竞选诺言而遭到人们的遣责。

•By staying out so late, they have betrayed my trust (= disappointed me because I had trusted them to not be late).他们在外面留到这么晚才回来，真是辜负了我的信任。

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•If he is nervous on stage, he does not betray it.他即使在舞台上十分紧张，也不会表露出来。

•Although she often seems quite cold and harsh, her smiling eyes betray her true nature.虽然她看上去总是冷漠刻薄，但她微笑的双眼却显示出了真性情。