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

So, you already have a hint that methyl groups are never in the middle, they always have to be on the outside.

那么，你已经得到了一个提示,那就是甲基永远都不可能在中间，它们总是在外侧。

麻省理工公开课 - 化学原理课程节选

When I do my best to imagine some kind of existence that would be desirable or attractive forever, it just doesn't work. It becomes a nightmare.

当我尽力想象一种,令人永远期望迷恋的存在时，根本想象不出，总是变成恶梦。

耶鲁公开课 - 死亡课程节选

He tells a story about something he calls "the state of nature," a term he did not invent, but with which his name will always and forever be associated, the idea of the state of nature.

他讲了一个故事，叫做,“自然状态“，这不是他所发明的词，但他的名字,总是会，也永远会和，“自然状态“联系在一起。

耶鲁公开课 - 政治哲学导论课程节选