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N-COUNT
痣;痦子
A mole is a natural dark spot or small dark lump on someone's skin.
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N-COUNT
鼴鼠
A mole is a small animal with black fur that lives underground.
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N-COUNT
間諜;臥底;內奸
A mole is a member of a government or other organization who gives secret information to the press or to a rival organization.
例句
He had been recruited by the Russians as a mole and trained in Moscow.
他被俄國人征募為間諜，并在莫斯科接受了訓練。