口语进阶一般为更资深的英语学习者准备，包括对词汇的了解，对语态的理解等。下面请结合mp3以及下方的原文和翻译，开始今天的口语进阶练习吧！

原文及翻译

At about the same time that Galileo supported the heliocentric idea, another astronomer did some important work that supported Copernicus's view. This astronomer was Johannes Kepler, who lived in Germany. 

大约在伽利略支持日心说的同时，另一位天文学家也做了一些重要的工作来支持哥白尼的观点。这位天文学家就是住在德国的约翰尼斯·开普勒。

Kepler used the observations of previous scientists to figure out the motion of the planets around the sun. He realized that the planets did not travel in circular paths, but instead in paths that were elliptical or oval in shape. Kepler's discoveries showed mathematically how the planets would revolve around the sun. 

开普勒利用前人科学家的观察结果来推算行星绕太阳的运动。他意识到行星不是以圆形轨道运行，而是以椭圆形或卵形轨道运行。开普勒的发现从数学上表明了行星如何绕太阳旋转。

Today, everyone knows that the earth moves around the sun, but for a long time, it seemed more reasonable to believe that the sun moved around the earth. We can thank the great scientists of the past who discovered the surprising truth.

今天，每个人都知道地球绕着太阳转，但长期以来，相信太阳绕着地球转似乎更合理。我们要感谢过去发现这一惊人事实的伟大科学家。

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