你可能知道，地球围绕太阳的轨道形状不像一个完美的圆。
You are probably aware that the earth's orbit around the sun is not shaped like a perfect circle.
一个完美的圆。小提琴和鼓。
它现在是一个完美的圆，因此能够快速地滚动，快到无法再欣赏美丽的花儿，不能与虫儿聊天了。
Now that it was a perfect circle, it could roll very fast, too fast to notice the flowers or talking to the worms.
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