您要查找的是不是：
- The leading role is played by a complete unknown. 演主角的是一个毫无名气的演员。
- The star of the film is a previously unknown actor. 这部电影里的明星以前是个默默无闻的演员。
- Languages develop continually through usage. 语言在使用中不断发展。
- Its greater part is unknown to me. 它的大部分对我是未知的。
- He was an unknown painter one year ago. 一年前，他还是一个不为人知的画家。
- He is totally ignorant of social usage. 他对社会习俗一无所知。
- The TV set was damaged from rough usage. 这架电视机由于使用太不小心而损坏了。
- This is a book on modern English usage. 这是一本关于现代英语惯用法的书。
- This is a fact hitherto unknown. 这是一个至今无人知道的事实。
- The tractor had been damaged by rough usage. 这辆拖拉机因使用不经心而损坏了。
- A quantity of unknown numerical value. 未知数数值不明的一个数量
- Kate is in bad with Lucy for some unknown reason. 因为某些不为人知的原因，凯特和露西关系不好。
- We use x as the symbol for an unknown quantity. 我们用x表示一个未知数。
- It is no safe wading in an unknown water. 不知水深浅，涉水不安全。
- The investigation was tabled for reasons unknown. 不知何故调查延缓进行。
- The ownership of the house is still unknown. 这栋房子的所有权至今无人知道。
- The unknown number can be calculated from the data. 通过已知数可以算出未知数。
- Many unknown writers aspire to fame. 许多不知名的作家渴望成名。
- He was an unknown novelist then. 当时他是位不出名的小说家。
- The painting was ascribed to an unknown artist. 那幅画被认定系一不出名的画家所作。
