unknown

Unknown的例句：a species of insect previously unknown to science.科學上以前尚未了解的一種昆蟲。The man's identity remains unknown.這名男子的身份還是個謎。

He was trying,for some unknown reason,to count the stars.不知何故，他試圖數星星。The author is virtually unknown outside Poland.在波蘭以外，這位作者實際上鮮為人知。

Within a short space of time a group of complete unknowns had established a wholly original form of humour.在很短的一段時間內，一羣完全籍籍無名之輩創立了一種全新的幽默形式。