One is time, that I think it takes certain amount of time to shed the thoughts, the anxiety in everything else.

第一是时间，要想,摆脱一些想法，摆脱焦虑，是需要一定的时间的。

普林斯顿公开课 - 人性课程节选

It's actually better to spend a certain amount of time just keeping your body in good condition

其实花一定时间保持身体的良好状态更好，

健康生活 - SpeakingMax英语口语达人

Another point about this sort of ambivalence about being czar is that he often made a point of choosing his most trusted advisors from the ranks of commoners and gave them the right to become titled after a certain amount of time after a certain amount of time in the royal bureaucracy.

他作为沙皇矛盾的另一点是,他最信任的顾问,常常是从普通民众中选出来的,而且经过一段时间后,他会在皇家官僚机构中给他们一个头衔

耶鲁公开课 - 欧洲文明课程节选

And they have to put in a certain amount of work time, working at the Food Co-op.

他们得抽出一部分时间去食品供销社工作。

布鲁克林的变化 - SpeakingMax英语口语达人