But, we "ve never lost an astronaut in flight. We" ve never had a tragedy like this.

然而我们从未在飞行中丧失过宇航员，从未经历过这样的灾难。

youdao

It doesn't matter if you've never heard of them or if you never think of them again-- but, Titian. The famous Titian.

你们没听说过或者听完课就忘了也没关系,例如著名的提香

耶鲁公开课 - 欧洲文明课程节选

I call the second argument "The argument from recycling"-- not the best label I suppose, but I've never been able to come up with a better one.

我把第二个观点称为"循环观点",可能这不是最好的名称,但是我没有想到更好的

耶鲁公开课 - 死亡课程节选

Tim swears he's seen a round-edged disc in the wild, but we've never seen such a thing ourselves.

ENGADGET: Take a very, very close look at the round-edged Wii U proprietary discs

I'm used to PRs and make-up artists being in attendance, but I've never known a group of writers to rock up before.

BBC: Am I Sacha Baron Cohen's next target?

Now, let me just close by saying this -- I've said this before, but I never miss an opportunity to impress this upon an audience.

WHITEHOUSE: President Obama Announces $4 Billion Investment in Education | The White House