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VERB
失信于；辜負(fù)
If you betray someone who loves or trusts you, your actions hurt and disappoint them.
例句
When I tell someone I will not betray his confidence I keep my word...
如果我告訴某人我不會(huì)辜負(fù)他的信任，我就會(huì)恪守諾言。
The President betrayed them when he went back on his promise not to raise taxes.
總統(tǒng)背叛了他們，違背了不加稅的諾言。
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VERB
背叛；出賣(mài)
If someone betrays their country or their friends, they give information to an enemy, putting their country's security or their friends' safety at risk.
例句
They offered me money if I would betray my associates...
他們提出來(lái)只要我供出同伙就給我錢(qián)。
The group were informers, and they betrayed the plan to the Germans.
這幫人是告密者，他們把計(jì)劃泄露給了德國(guó)人。
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VERB
違背，背棄（理想或原則）
If you betray an ideal or your principles, you say or do something which goes against those beliefs.
例句
We betray the ideals of our country when we support capital punishment.
如果我們支持死刑，那就背棄了我們立國(guó)的理念。
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VERB
流露出；暴露出
If you betray a feeling or quality, you show it without intending to.
例句
She studied his face, but it betrayed nothing...
她仔細(xì)端詳了一番他的臉，但什么也沒(méi)有看出來(lái)。
He nodded his head instead of saying anything where his voice might betray him.
他一言不發(fā)，只是點(diǎn)頭，因?yàn)橐婚_(kāi)口可能會(huì)露出破綻。