名词
中文翻译：空间速率
同义词：
['speed of space', 'space velocity']
例句：
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1. The spacecraft's speed of travel is measured in kilometers per second.
航天飞船的旅行速度以公里每秒为单位测量。
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2. The rocket's space velocity was calculated to be 10,000 miles per hour.
火箭的太空速度被计算为每小时10,000英里。
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3. The astronauts are accelerating towards their destination at a space rate of 2,500 mph.
宇航员正以每分钟2,500英里的速度向目的地加速。