So if an argument is valid and the conclusion is false then we know that at least one of the premises must be false.

如果论点有效，结论为假，那么我们知道至少有一个前提肯定为假。

youdao

If we know all these rates of change then we know how to take these derivatives without actually having to plug in values.

如果知道所有的这些变化率，那么求偏导时，就不需要把u、v代回f了。

youdao

After the first few games they seemed in a position to compete with Inter, then we know how it ended.

最初几场比赛下来，他们竟似与国米同辉。但你我猜中了开头，却没有猜中这结局。

youdao

"One correspondent not from America and then I will--(REPORTERS YELLING)--You know, we are not doing bidding here.Come on,".

VOA: standard.2009.04.03

That's correct. So her answer was, if it was a full parabola, then we know it would've been at the ground before I set my clock to 0.

她说,如果运动轨迹为一条完整的抛物线,那么它在我们所设定的零时刻之前,就已经落地了

耶鲁公开课 - 基础物理课程节选

We went out for sushi and then we went to a small concert. You know, it was actually really great.

我们去吃了寿司，去听了个小型音乐会，真的很棒。

体验男女初次会面 - SpeakingMax英语口语达人

Then we know that person is at least fast enough to play this game.

NEWYORKER: Most Likely to Succeed

"If the mosquitoes fly away, then we know it's repellant, " Bernier said.

NPR: Mosquito War: New Chemicals May Beat DEET

If it is positive, as the Duke data proves, then we know that 4 months is low end of the median survival benefit of Provenge.

FORBES: Why The New Dendreon Analysis Does Matter -- And Why It Doesn't