名词
中文翻译：星云的
同义词：
['astral', 'stellar']
例句：
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1.The astronauts are exploring the outer space.
宇航员正在探索外太空。
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2. The astronauts have been living in the astronaut's habitat for months.
宇航员已经在太空生活了几个月。
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3. The astronauts are studying the stars and planets in the astronaut's habitat.
宇航员们在太空站研究星星和行星。