名词无线电射线
1. 无线电射线：radio astronomy 射电天文学 | radio beam 无线电射线 | radio button 单选按钮
2. 无线电波束：radio beacon marker 无线电信标标誌 | radio beam 无线电波束 | radio beam 无线电波束
3. 无线电导航波柱：1278 Radio Beacon 无线电信标 | 1279 Radio Beam 无线电导航波柱 | 1280 Radio Bearing 无线电方位
1. The phone shoots the card data in an infrared beam or radio waves.
noun
1. a signal transmitted along a narrow path
guides airplane pilots in darkness or bad weather
Synonym: beam