1
a betrayer of [noun phrase]
He was regarded as a betrayer of his country.
他被视为国家的背叛者。
背叛者；告密者
先理解核心含义，再看它在真实句子里的用法。
背叛者；告密者
A person who betrays someone or something, or reveals confidential information; an informer.
He was regarded as a betrayer of his country.
他被视为国家的背叛者。
背叛者或泄露机密信息的人；告密者
Someone who betrays, or reveals confidential information; a squealer or informer.
After months of secrets, the group discovered that the betrayer was sitting among them.
经过几个月的保密，这个组织发现背叛者就在他们中间。
He refused to reveal his source, claiming he was no betrayer.
他拒绝透露消息来源，声称自己不是背叛者。
The movie tells the story of a betrayer who destroyed a powerful family.
这部电影讲述了一个背叛者摧毁一个有权势家族的故事。
He was regarded as a betrayer of his country.
他被视为国家的背叛者。
常用于指具体某人的背叛者。
She never forgave her betrayer.
她从未原谅背叛她的人。
Not this
He betrayer his friend.
Use this
He betrayed his friend.
betrayer 是名词，表示‘背叛者’，不能用作动词；应使用动词 betray 的过去式 betrayed。
Not this
His betrayer was shocking.
Use this
His betrayal was shocking.
betrayer 指人（背叛者），而这里需要表示‘背叛’这个行为，应使用名词 betrayal。
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Dictionary facts from ECDICT, WIKTIONARY.