The bloated planet can be explained by a highly elliptical orbit, which brings it close to the star and then far away.
这颗膨胀的行星可以用高度椭圆形轨道来解释。高度椭圆形轨道先使它距离星很近，然后远离。
Mercury's orbit is highly eccentric, meaning it's path is elliptical.
水星的轨道非常古怪，这意味着它的路径是椭圆形。
Mercury's orbit is highly eccentric, meaning it's path is elliptical.
水星的轨道非常古怪，这意味着它的路径是椭圆形。
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