所以好好的享受这些美妙的太阳耀斑和日冕带来的太阳风吧，可能要经过相当长一段时间我们才能再次观赏到他们了。

So enjoy the current rash of solar flares and beautiful coronal mass ejections; it might be some time before we see a solar cycle like this again.

youdao

经过一段时间以后，就像我们的眼睛适应了光环一样，我们渐渐看到了与光环相伴的阴影，或许是相当大的一个阴影。

It's so bright and beautiful. But after awhile, as our eyes adjust, we notice that this light is accompanied by a shadow - and usually a fairly large one.

youdao

但是，经过一段时间之后，创建的这些组及其成员会变得相当复杂，成为管理负担。

However, over a period of time, the creating of these groups with its members can become an administrative headache and rather complex.

youdao

Even if you imagine that slaves did the work, you would need a hell of a lot of them, over a long period of time, and you had to feed them, if nothing else.

哪怕你想象这个墓穴是由奴隶所建造,那也一定是成千上万的奴隶,经过了相当长的时间工作,至少,你还要养活这些奴隶

耶鲁公开课 - 古希腊历史简介课程节选