However,its effectiveness had never before been compared to that of medicines in a large study.

VOA: special.2009.02.03

You might say, this should have been obvious to someone, but it had never been written up well before.

有人可能会说,这谁都知道,但之前从未有人记录下这个概念

耶鲁公开课 - 金融市场课程节选

Would anybody volunteer to say a sentence, non obscene, non derogatory, that has never been spoken before on earth, ever?

有没有人自愿说个句子,不能是下流的,不敬的,得是世上从未有人说过的句子

耶鲁公开课 - 心理学导论课程节选

"To me,exploration is going to someplace you have never been before."

VOA: standard.2009.07.20

Now the Lady, it's been noted before, is never really able to respond to Comus' accusation of her hoarding.

现在小姐已经注意到，从来不能真正应对Comus对她的指控。

耶鲁公开课 - 弥尔顿课程节选

He said, "Look at all of this I've never been exposed to before.

他说：“我从未经历过,这一切。

普林斯顿公开课 - 人性课程节选

We prove things in mathematics that have never been proven before or we find new ways to prove these theorems or what have you and we can be creative.

我们用数学去证明从未被证明过的事物,我们探寻新的方法去证明那些定理,或其他诸如此类,总之,我们具有创造力

耶鲁公开课 - 死亡课程节选