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The frequencies of the returned beams are compared with them to obtain the true ground speed.
将它们与反回射束作对比而获得真实的地面速度.
辞典例句
CSN 3101 expedite passing 4500 m , your ground speed is larger than previous the preceding.
CSN3101尽快通过45因为有追赶,它的地速比你小.
期刊摘选
地速???
地速???航行中航空器投影于地球表面运动的速度。???
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