So let's turn our attention to a new topic, which is thinking a little bit about the periodic table, and also talking about periodic trends.

我们的新主题上，我们将会讨论一点关于元素周期表的知识，同时也会讲一讲周期性规律。

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So let's turn our attention to a new topic, which is thinking a little bit about the periodic table, and also talking about periodic trends.

我们的新主题上，我们将会讨论一点关于元素周期表的知识，同时也会讲一讲周期性规律。

麻省理工公开课 - 化学原理课程节选

Then he looked at periodic savers, folks such as wage earners who save a little bit each paycheck, and found the losses were still awful, a gap of between 18% and 26% over the three decades.

FORBES: Actively Managed Funds: A Faulty Product?