The flying saucer is yet an unsolved mystery.

飞碟仍然是未解之谜.

《简明英汉词典》

The origin of the room is virtually an open question at this time.

实际上,到现在为止,月球的起源还是个未解之谜.

辞典例句

Until now is an unsolved mystery.

至今还是个未解之谜.

互联网

It's one of many mysteries to unravel, as his team tries to grow body parts scratch.

这尚有许多未解之谜, 因为他的团队正试图从零开始生长出人体身体部位.

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