为什么人们想要被记录在吉尼斯世界纪录呢？这就像是问为什么参加奥林匹克运动会的运动员不断尝试，想要跑得更快，扔得更远和跳得更高。

Why do people try to get into the Guinness book? That might seem like asking why Olympic athletes keep trying to run faster, throw farther and jump higher.

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That is why we don't worry about the motion of the nucleus 1 because the ratio of mass is about 2,000 to one.

这就解释了为什么我们不担心,原子核运动起来,因为原子核和电子的质量比约为2000：

麻省理工公开课 - 固态化学导论课程节选