"The bus went into the middle of the desert and at a certain moment the call to prayer came just lilting through the desert - first time I've ever heard it - and then the bus stopped and all of those colorful people got off the bus."

VOA: standard.2010.05.21

Each year it's dramatized by the cycle of the seasons, And at a certain time of the year it seems that The forces of darkness and chaos are prevailing but each spring, Once again, cosmic order and life return.

每年这冲突都由季节的轮回戏剧性地体现出来，仿佛是每年都有一个时期,弥散着黑暗和混乱的势力，可是每当春天来临，宇庙的秩序又恢复了。

耶鲁公开课 - 旧约导论课程节选

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

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

But at the same time the Market Revolution is going to bring a certain sense of anxiety, even dread, even despair.

同时市场革命将,带来某种焦虑,甚至是可怕的和绝望的

耶鲁公开课 - 美国内战与重建课程节选

For my perspective, even if you understand God to be the creator of the world, I don't think that means that God is causing a certain natural event to happen at certain time.

从我的角度来说，即使你明白,上帝是世界的创造者，但这并不意味着上帝,导致了某个自然界的现象在特定的时间发生。

普林斯顿公开课 - 人性课程节选

At that time t, the x coordinate must have a certain value.

在该时刻,x 坐标一定是个确定的值

耶鲁公开课 - 基础物理课程节选