遗憾的是，一秒钟的标准定义依赖于原子在绝对零度的条件，而实际的时钟需要在室温下运行，室温条件下电子壳层膨胀了。
Unfortunately, the standard definition of a second relies on what the atom does at a temperature of absolute zero. Real clocks need to run at room temperature, where the shell of electrons puffs up.
鸡蛋连壳放在大碗中，以热水浸泡约10分钟。
In a large bowl, cover eggs in hot tap water and let sit for 10 min.
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