| 单词 | focused beam |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔radio beam〕A focused beam of radio signals transmitted by a radio beacon to guide aircraft or ships.无线电射束：无线电指向标发出的一束无线电讯号给飞机或轮船导航美国传统〔scan〕To move a finely focused beam of light or electrons in a systematic pattern over (a surface) in order to reproduce or sense and subsequently transmit an image.扫描：以系统的方式移动高度集中的光或电子束使之掠过（一个表面），目的是再现或感知并达到传递图象美国传统〔spotlight〕An artificial source of light with a strongly focused beam, as on an automobile.探照灯：集中强光的人工光源，如在汽车上安装的探照灯美国传统 |
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