名词
中文翻译：第一宇宙速度
同义词：
['first orbital velocity']
例句：
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1.The spacecraft reached its first cosmic velocity when it left the launch pad.
当航天器离开发射台时，它达到了第一宇宙速度。
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2. The rocket's first cosmic velocity was achieved at an altitude of 50 kilometers.
火箭的第一宇宙速度在50公里的高度达到。
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3. The astronauts were able to reach their first cosmic velocity during a critical phase of the mission.
宇航员能够在任务的关键阶段达到他们的第一宇宙速度。