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

I don't know if that's true. I haven't been to enough cities outside of the United States.

我不知道这是不是事实。我去过美国以外的地方还很少，不能妄下定论。

纽约的人们 - SpeakingMax英语口语达人