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模仿句子:The object, which has been nicknamed Planet Nine by researchers of the California Institute of Technology, is orbiting billions of miles beyond Neptune1.
翻译:这一被加州科技研究所研究者命名为“第九行星”的星体,正在海王星的数十亿里之外,(围绕着太阳)公转。
![](/upimg/allimg/161021/0G05I932-0.jpg)
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1
Neptune
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n.海王星 | |
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