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实测天文学在这里所面临的头等任务是研究实际的星际云。
The Paramount task here facing observational astronomy is to study real interstellar clouds.
youdao
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实测天文学在这里所面临的头等任务是研究实际的星际云。
The Paramount task here facing observational astronomy is to study real interstellar clouds.
youdao