前缀
中文翻译：外
同义词：
['outside', 'beyond', 'outside']
例句：
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1. Exoplanets are planets that orbit stars other than our sun.
系外行星是绕着除太阳以外的恒星运行的行星。
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2. The exoplanet is located in the habitable zone of its star.
这颗系外行星位于其恒星宜居带内。
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3. The discovery of exoplanets has opened up new possibilities for space exploration.
发现系外行星为太空探索开辟了新的可能性。