unknown

Unknown的例句：a species of insect previously unknown to science.科学上以前尚未了解的一种昆虫。The man's identity remains unknown.这名男子的身份还是个谜。

He was trying,for some unknown reason,to count the stars.不知何故，他试图数星星。The author is virtually unknown outside Poland.在波兰以外，这位作者实际上鲜为人知。

Within a short space of time a group of complete unknowns had established a wholly original form of humour.在很短的一段时间内，一群完全籍籍无名之辈创立了一种全新的幽默形式。