The writing process is made up of four stages, and each stage involves certain activities.

写作的过程由四个阶段组成，每个阶段都包含一定的活动。

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It might mean monitoring employee productivity on a digital leaderboard and offering prizes to the winners, or giving employees digital badges or stars for completing certain activities.

这可能意味着，在数字排行榜上监督员工的工作效率，并为优胜者提供奖品，或者为完成某些任务的员工颁发数字徽章或星星奖励。

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Do certain activities agitate you?

某些活动会不会使你激动起来呢？

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Among the new measures are an expanded arms embargo and a ban on certain ballistic missile activities.

VOA: standard.2010.06.09

There'd be certain activities perhaps, for example putting a gun to your head, that would put an end to your life.

也许会有某些特定的活动，比如用枪指着你的头，会结束你的生命。

耶鲁公开课 - 死亡课程节选

Suppose that most times and most activities were death free, but certain activities introduce the possibility of dying.

假设大部分时间和大部分活动都是死亡免疫的，但某些活动,会引起死亡的可能性。

耶鲁公开课 - 死亡课程节选

There are certain activities that may be more dangerous than talking on a cell phone.

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Teachers still call home to ask if it is OK for Celia to participate in certain activities, Ms. Vigil says.

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There are even admonitions to avoid certain activities on New Year's Day because they portend bad luck for the coming year.

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