Their astronomers had discovered that at a certain time of year the brightest star, Sirius, would disappear.

他们的天文学家发现，在一年中的某个时候，最亮的天狼星会消失。

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Unlike most libraries, a mini-bus with library books go to a certain place at a certain time.

与大多数图书馆不同，放着图书馆书籍的在特定的时间去特定的地方。

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At a certain time and a certain place, when a moonbow happens to appear, you can't miss it if you're right there.

在特定的时间和地点，当月虹恰巧出现时，如果你就在那里，千万不要错过它。

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"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

Shareholders, unlike bondholders, receive no legal promise to be repaid in cash at a certain time.

ECONOMIST: Stocks in trade | The

You know, I made a mistake, and at a certain time, it came time to pay for it, and I paid for it.

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Arguably, archived email, handled the right way, could perform the same function, essentially, a certification that a document was created at a certain time and has not been altered.

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