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单词 卫星信号
释义 〔feedhorn〕A satellite dish component that captures the signal reflected from the dish surface and channels it into an amplifier.碟形卫星天线:碟形卫星信号接收器设备,可以捕捉自碟形表面所反射出来的讯号并传送至放大器〔WAN〕A communications network that uses such devices as telephone lines, satellite dishes, or radio waves to span a larger geographic area than can be covered by a LAN.广域网络,宽域网络:利用电话线路、卫星信号接收器或无线电波等设备的通信网路,其覆盖的地域大于局域网络
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