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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答案是特定细胞中只有一小部分基因在特定的时间被表达或使用。

The answer is that only a small subset of the genes in a particular kind of cell are expressed, or turned on, at a given time.

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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

So this might be a longer lasting, more permanent form of elimination of expression of a particular gene.

所以这似乎是一种持续时间更长,更长久地阻止某个特定基因表达的方法

耶鲁公开课 - 生物医学工程探索课程节选

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