形容词
中文翻译：秘密的
同义词：
['secretive', 'mysterious', 'secretiveness']
例句：
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1. The oldmansion was filled with secrets that no one knew about.
这座古老的豪宅里充满了不为人知的秘密。
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2. The detective was so secretive that he kept his movements to himself.
这位侦探非常神秘，他的行为总是保密的。
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3. The mystery of the disappearance remains a secretive tale for many years.
失踪事件的谜团多年来一直是个未解之谜。