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- Estimation of unknown noise statistics quantity and estimation of signal states are alternatively done, this method is applied to GPS positioning, Computer simulation shows the approach is efficient. 将未知噪声统计量的估计与信号状态估计交替进行的算法引入GPS定位，计算机模拟结果表明效果很好。
- A Method for Azimuth Angle Estimations of Sources in Unknown Noise Environments 未知噪声背景下多声源方位角的估计方法
- A Method for High-resolution DOA Estimation in Unknown Noise Environments 一种用于未知噪声背景中高分辨DOA估计的方法
- The leading role is played by a complete unknown. 演主角的是一个毫无名气的演员。
- A loud noise from the street diverted my attention. 街上一阵喧闹声转移了我的注意力。
- 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 noise awoke her from her revery. 这声音把我她从沉思中惊醒。
- That noise is driving me frantic. 那种噪音真要把我弄疯了。
- The thick walls deadened the noise from the street. 这道厚墙隔绝了街上的噪音。
- 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。
- A noise abatement notice is served on the club. 向俱乐部发停止大声喧哗的通知。
- The noise of traffic grows louder and louder. 交通的噪音变得愈来愈大。
- The noise struck terror into their hearts. 那声音使他们心里产生恐惧。
- 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。
- He turned around as he heard a noise behind him. 他听到身后有响声，便转过身来。
- The boy jumped up in surprise at the sudden noise. 突如其来的响声吓得这个男孩跳了起来。
- We use x as the symbol for an unknown quantity. 我们用x表示一个未知数。
