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上图是为纪念哈勃太空望远镜升空20周年而发布的。
The above image was released last week in commemoration of the Hubble Space Telescopes 20th year of operation.
youdao
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上图是为纪念哈勃太空望远镜升空20周年而发布的。
The above image was released last week in commemoration of the Hubble Space Telescopes 20th year of operation.
youdao