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。
- The forest will act as a defense against desert dust. 森林能起防御沙漠灰沙的作用。
- Legislatures often act in a negatory manner. 立法机关常采取消极行动。
- 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。
- This dreadful murder is surely the act of a madman. 这种令人惊骇的谋杀纯粹是疯子的行为。
- He made a resolution never to repeat the act. 他决心不再采取那种行动。
- All his life he tried to act out his beliefs. 他一生致力于把自己的信仰变成行动。
- This is a fact hitherto unknown. 这是一个至今无人知道的事实。
- Taking a blind man across the street is a kind act. 扶盲人过马路是一种善良的行为。
- A quantity of unknown numerical value. 未知数数值不明的一个数量
- The legal guardian must act on behalf of the child. 法定监护人应该维护这个孩子的利益。
- 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。
- It will not befit a priest to act uncharitably. 牧师不以慈悲为怀是不合适的。
- 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。
- Do you think sexual act outside marriage is wrong? 你认为婚外性行为是不对的吗？
