以太波;电磁波

ether wave的用法和样例：

例句

The electronmagnetic wave is produced by microwave tubes called klystrons.电磁波是由一种称为速调管的微波电子管产生的。
In both cases the train effectively rides on an electromagnetic wave.在这两种情形下，列车都是有效地骑在电磁波上。

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学英语单词

bijective homeomorphism

board ... up

bonnicis

boost/coast motor