I've not seen thee before today.

我今天以前没见过你。

youdao

I certainly didn't know this credit card scam existed before today.

在今天之前，我对这种信用卡诈骗就一无所知。

youdao

He admitted that he was not familiar with Ostrom's work before today, but now understood why she had won.

他承认，在今天之前，他对奥斯特罗姆的研究成果不熟悉，但现在明白她为什么赢得这项荣誉了。

youdao

For each country, researchers estimated the probability that a fifteen-year-old today will die an early death before the age of sixty.

VOA: special.2010.05.05

And he actually did this in the late 1800's, back before even all of the elements that we know today were discovered, really only about 60% or so, 70% were discovered then that we now know today.

他最终在十九世纪晚期完成了这一壮举，难能可贵的是,虽然我们现在已经发现了所有的元素，但在当时已知的元素只有我们现在知道,百分之六七十，在这种情况下。

麻省理工公开课 - 化学原理课程节选

All right. So before we start in with today's notes, I do want to mention that this morning the Nobel Prize in chemistry was announced.

好的，在开始今天的课之前，我要说一下今天早上,公布了诺贝尔化学奖。

麻省理工公开课 - 化学原理课程节选

Before today, the last impressively destructive impact was in 1908, and coincidentally also in Siberia.

FORBES: What Can NASA Do To Stop An Asteroid From Hitting Earth?

Before today, customers had to worry whether the Bloom boxes would last a long time.

FORBES: Bloom Energy's New Pay-For-Power Plan Opens Big Markets

Giacomo had lost all three of his races this year before today's triumph for jockey Mike Smith.

NPR: The Science of Naming a Racehorse