他们得按时返回，或者永远别回来。

They are to return by that time or not return at all.

youdao

很多人都有太多从不会用或者永远都不会再用的东西。

Most people have far too many things they never use and will never use again.

youdao

我只是想说，单身是一种生活选择，一种暂时或者永远的选择。

I'm just trying to say: Being single is an option. It's a valid option: temporarily, or indefinitely.

youdao

We can never just have it there before us or, as I say, if we can--if we can--it's a very, very difficult act of concentration.

我们永远不能只面对着它，或者，要我来说，如果我们可以的话，那将需要高度集中注意力，这是很难的。

耶鲁公开课 - 文学理论导论课程节选

So, for example, hydrogen or fluorine they'll never be in the middle, they'll always be on the end of a molecule.

比如，氢或者氟,永远不会在中间，它们总是会在分子中最边缘的位置。

麻省理工公开课 - 化学原理课程节选

Snakes are symbols of renewed life and fertility in the East ; because they shed their skins so they seem to be eternally young; and they're also phallic symbols.

在东方，蛇一般都是新生命或者多产的象征,因为，蛇的蜕皮，似乎能使它永远年轻;,蛇同样也是生殖力的象征。

耶鲁公开课 - 旧约导论课程节选