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- Unknown hazards must hold no terrors for us. 潜伏的危险肯定不会使我们警觉、害怕。
- As to the author of the book, I will hazard a guess. 关於这本书的作者，我来试猜一下。
- 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。
- The car had its hazard warning lights on. 这辆汽车亮起了危险信号灯。
- Wet roads are a hazard to drivers. 道路湿滑会对司机构成危险。
- 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。
- If I might hazard a guess, I'd say she was about30. 要是让我猜的话，我说她大概。
- Smoking is a serious health hazard. 吸烟严重危及健康。
- This is a fact hitherto unknown. 这是一个至今无人知道的事实。
- 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。
- Rock-clibmers sometimes hazard their lives. 攀登岩石的运动员有时要冒生命危险。
- 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。
