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Electromagnetic launch technology is one important step in the human energy use history.
电磁发射技术是人类能源利用史上的一次重大进步。
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Antenna is needed to receive and launch electromagnetic wave.
天线是接收、发射电磁波的必备部件。
youdao
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Antenna is needed to receive and launch electromagnetic wave.
天线是接收、发射电磁波的必备部件。
youdao