There comes a time when children need to know more than the basic facts of life.

儿童到了一定的时候就需要了解更多的性知识。

《柯林斯英汉双解大词典》

After the time of testing comes a time of reflection and then of action.

检验过后便是反思和行动。

youdao

There comes a time when the response you seek is no longer useful.

总会有一个时间期限，过了这个期限之后，你想要的答复将不再有用了。

youdao

In time,they said, the moving ocean floor is blocked when it comes up against the edge of a continent.

VOA: special.2010.01.12

Why don't we have you, when the time comes, raise your hand if you're supposed to be representing a one?

为什么让家上来呢，如果你代表1，就举起你的手？

哈佛公开课 - 计算机科学课程节选

We have 266 ping-pong balls, and we need someone, hopefully you, to be some radioactive material that are going to be emitting these ping-pong balls. And when the time comes, in just a minute, I'll ask the TAs to come down and hand these out very quickly to you, so we can do this experiment.

你们有些人那天，看到我在办公室数乒乓球，我们需要几个人,希望是你,来作为放射材料，放射这些乒乓球,等会我会让助教,把这些球发给你们。

麻省理工公开课 - 化学原理课程节选

There comes a time, however, when action speaks louder than any cacophony of words.

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There comes a time when you have to take initiatives in favor of peace.

WHITEHOUSE: President Obama and President Sarkozy at the White House

Every so often there comes a time to pay tribute to your roots.

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