It began to infiltrate other disciplines and was in general a high-spirited horse for that certain period of time.

它逐渐渗入到其它学科,总之是那个时代的一匹黑马。

耶鲁公开课 - 文学理论导论课程节选

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

In certain ways, it's a beautiful poem and a grotesque one at the same time.

从某种意义上来说，这诗很美,但也很丑陋。

耶鲁公开课 - 现代诗歌课程节选

And so the stories couldn't have been simple inventions, and that began a new phase in the story. And, again, to repeat what I said last time, there were certain stunning physical resemblances between what Homer said and what we could see.

所以,神话传说并不只是人们的空想,这样事情就有所不同了,同时,我重复下我上次所说的,《荷马史诗》所描述的世界,在当今确有令人吃惊的实物证据

耶鲁公开课 - 古希腊历史简介课程节选

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