You might need an activity that does nothing at all, such as when you have a construction that requires an activity, but there is no work to be done.

您可能需要一个根本不执行任何工作的活动，例如，当您拥有一个需要某个活动的构造，但没有要执行的任何工作时。

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It can also be antagonistic, such as when a political candidate turns toward their competitor during a debate and makes eye contact that signals hostility.

它也可以是对抗性的，例如，当一个政治候选人在辩论中转向他们的竞争对手，并进行眼神交流，表明敌意。

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The most common example is user information, such as when a user logs on.

最常见的示例是用户信息，比如当用户登录时。

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Now,there came to my ears a low,dull,quick sound, such as a watch makes when inside a piece of cotton.

VOA: special.2009.05.16

So, he writes: To the psychologist alone can such questions occur as: Why do we smile when pleased and not scowl?

他这样写到：,对哲学家本身说,会出现这些问题：,为什么开心时我们微笑而非皱眉？

耶鲁公开课 - 心理学导论课程节选

We'll get more into the way that the research is conducted when we talk about phenomenon such as meditation.

我们会深入讨论研究的进行方式,当我们谈到冥想等现象。

哈佛公开课 - 幸福课课程节选

People get big tax bills in some years, such as when they pay estate taxes.

WSJ: John H. Cochrane: America Needs an Alternative

So you might want to use private browsing selectively, such as when looking at health-related information.

WSJ: How to Outsmart Tracking Cookies on the Web

There have been success stories, though, such as when former Taliban commanders became members of the parliament.

CNN: Is talking to Taliban the right approach?