So, the chances of getting any activity from these inner shell of electrons are vanishingly small.
所以，内层电子间，进行反应的可能性，是很小很小的。
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.
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。
All noble gases have the maximum number of electrons possible in their outer shell (two for helium, eight for all others), making them highly stable.
所有的稀有气体元素的最外层电子数都是该层最大的可能数目：氦的最外层电子有两个，其它的稀有气体最外层电子数是八。这使稀有气体非常稳定。
All noble gases have the maximum number of electrons possible in their outer shell (two for helium, eight for all others), making them highly stable.
所有的稀有气体元素的最外层电子数都是该层最大的可能数目：氦的最外层电子有两个，其它的稀有气体最外层电子数是八。这使稀有气体非常稳定。
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