Lighten up: Certain topics, issues and events are serious but not everything is! Lighten up.

点睛：某些话题，观点和事情是很重要但却不是唯一。

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It is worthwhile, to observe ourselves, and our emotional reactions towards certain topics.

自己以及自身对于一些问题的情绪反应值得我们观察。

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Some bigger schools have subject librarians and libraries who specialize in certain topics, like history.

一些大的学校会有主题图书馆或者是专注于某一特定领域比如历史的图书馆。

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They focus more on who is influential and why on certain topics and trend this over time.

FORBES: The Democratization of Social Influence

But there are house rules against certain topics: politics, softball and chain saws.

FORBES: Finding Sanctuary on Nine-Eleven

The volume and velocity of conversation on certain topics can at the very least serve as a barometer of voter sentiment.

FORBES: Does Anyone Care About Voter Suppression?