| 单词 | 电波 |
| 释义 | 〔beam〕a beam of protons; a beam of light.质子电波；光束〔telephone〕An instrument that converts voice and other sound signals into a form that can be transmitted to remote locations and that receives and reconverts waves into sound signals.电话机：将话音和其它声音信号转变成能传送到远方地点的形式，而远处能接收电波并将电波还原成声音信号的仪器〔heterodyne〕To combine (a radio-frequency wave) with a locally generated wave of different frequency in order to produce a new frequency equal to the sum or difference of the two.外差：把（一个无线电频率波）与另一个频率不同的局部产生的电波层混合，以产生相当于原来两个的总和或差拍的新频率〔intermodulation〕Modulation of the frequencies of electromagnetic waves occurring when the waves interact as they are transmitted through a nonlinear electronic system.居中调频：当电波经由非线性电子系统传递时，电磁波交互作用所发生电磁波频率的调整〔sonobuoy〕A buoy equipped with an acoustic receiver and a radio transmitter that emits radio signals when it detects underwater sounds.声纳浮标：一种浮标，上面装配有原声接受器以及在探测水底声音时能发射出电波信号的电波发射机〔ultrashort〕Of or relating to radio waves with a wavelength less than 10 meters (33 feet).超短波的：波长小于10米(33英尺）的电波的或与波长小于10米(33英尺）的电波有关的〔window〕A range of electromagnetic frequencies that pass unobstructed through a planetary atmosphere.电波反射装置：电磁波段能够不受阻碍地穿过行星大气层的一种电磁频率范围〔telescope〕Any of various devices, such as a radio telescope, used to detect and observe distant objects by their emission, transmission, reflection, or other interaction with invisible radiation.电波望远镜：通过远距离物体的发射、透射、反射或其它不可见辐射的相互作用来探测和观察远距离物体的设备，例如电波望远镜〔sideband〕Either of the two bands of frequencies, one just above and one just below a carrier frequency, that result from modulation of a carrier wave.边（频）带：两个频率带之中的任何一个，一个恰好高于且另一个恰好低于载体的频率，因载体的电波调制造成的 |
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