时尚业也存在着一个周期性的模式。

There is also a cyclical pattern in fashion.

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他经历了周期性的变化。

He has gone through periodical changes

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if we think about electronegativity as a periodic trend we can just draw our nice periodic table here, and let's separate it into quadrants.

如果我们来思考一下电负性的周期性规律,我们可以把我们漂亮的周期表画在这，然后把它分成四个象限。

麻省理工公开课 - 化学原理课程节选

We have a table of the elements with properties varying periodically with atomic mass, so we compress all of that information and refer to it as the Periodic Table.

我们有一个元素表，其中的元素的特性,随着原子质量的改变而引起周期性的变化，所以我们将所有的信息精简,将它变成一个周期表。

麻省理工公开课 - 固态化学导论课程节选

sort of takes the cyclicality out of earnings and you can see over history how that multiple has varied.

一定程度上在收益上避免了周期性的,而且你可以看到随着历史的进程,这个倍数发生了多大的变化。

耶鲁公开课 - 金融市场课程节选