Until that point, we have no reason to really give up on our current existing ideas about what justice is.

直到完全了解，我们没有理由放弃,我们目前现存有关正义的概念。

耶鲁公开课 - 政治哲学导论课程节选

We can't conclude that until we know that there aren't any competitors, that there isn't anybody else right now who also has the same personality.

我们不能妄下定论，直到确定没有其他竞争者，确定目前没有其他任何人拥有相同的人格。

耶鲁公开课 - 死亡课程节选

So what actually turns out the reality is that h e 2 does exist, but it exists as the weakest chemical bond known, and it wasn't, in fact, even found to exist until 1993, so I can assure you this is not a bond that you see very often in nature, and it is a very, very weak bond.

实际上He2键是存在的，但它是目前所知的最弱的键，直到1993年它才被发现，所以我可以向你们保证在,自然界你们不可能经常看到它，它是种非常非常弱得键。

麻省理工公开课 - 化学原理课程节选