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。

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

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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。

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

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只有在特定的时间和条件下，他们才会在设在日本港口附近的工厂进行加工。

This is only at certain times and on condition that they are processed at factories based near Japanese ports.

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In Yeats people are always particulars who are fitted to types which are new versions of old identities that travel across time.

在他的诗歌里人总是特定的,某些类型，是穿越时间的,古老人物的现代化身。

耶鲁公开课 - 现代诗歌课程节选

In another example, you could explain what you're doing not only at a particular moment,

在下面一个例子中，你可以解释不仅仅在一个特定时间干的事情。

I'm ~ing 课堂 - SpeakingMax英语口语达人

There are lots of people who have pointed out to us that before a certain period, there was no such thing as man, and in a variety of quite real senses, after a certain moment in the history of culture, there is also no such thing as man.

很多人向我们指出,在某一特定时间点前是没有人类的，而且在真实意义上，在文化史中的某一特定时刻后，人类也不存在。

耶鲁公开课 - 文学理论导论课程节选