unknown的音标是 ʌnˈnoʊn

unknown作为形容词，意思是未知的、不知名的、不熟悉的。作为名词，指未知的人、事物或地方。

相应英文带中文翻译的例句10句：

1 The cause of the problem is still unknown 问题的原因仍然未知
2 She was afraid of the unknown future 她对未知的未来感到恐惧
3 The artist was almost unknown during his lifetime 这位艺术家在世时几乎不为人知
4 They ventured into unknown territory 他们冒险进入了未知领域
5 The number of casualties is unknown 伤亡人数未知
6 He received a letter from an unknown sender 他收到一封来自未知发件人的信
7 The book explores the unknown depths of the ocean 这本书探索了海洋的未知深处
8 Her talent remained unknown to the public 她的才华一直未被公众所知
9 We are facing an unknown quantity 我们正面对一个未知量
10 The virus came from an unknown source 该病毒来源于一个未知的源头

短语搭配：
unknown quantity 未知量
unknown territory 未知领域
unknown factor 未知因素
unknown origin 未知来源
remain unknown 仍然不为人知
virtually unknown 几乎不为人知
relatively unknown 相对不知名
largely unknown 很大程度上未知
unknown to someone 不为某人所知
the great unknown 巨大的未知世界