形容词
中文翻译：秘密的
同义词：
['private', 'confidential', 'top secret例句：1. The secret of the recipe is a well-kept secret.（这个食谱的秘密是保密的。）']
例句：
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1. The secret of the recipe is a well-kept secret.
这个食谱的秘密是保密的。
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2. He kept the secret from everyone but his closest friend.
他只告诉了他最亲密的朋友。
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3. The government has been keeping a secret from the public about their plans.
政府一直对公众隐瞒他们的计划。