A minor or isolated reaction can become chronic with repeated exposure to an allergen, or when other cells involved in the immune system, the t cells, come into play.

一开始轻微并单一的反应也可能因为反复接触同一过敏原，或者其它的细胞比如T细胞的参与反应而变成慢性症状。

youdao

So observed... Ten t observed... is it 12.18? Okay, 1 my reaction time is 0.1.

所以，观察到的…，10t…，是12。18 ？，我的反应时间是0。

youdao

Results: The tests didn′t reveal any marked stimulation in the marginal ear vessels of the rabbits, nor did cause allergic reaction and hemolysis.

结果：实验表明该药对家兔耳缘静脉无明显刺激作用，也不引起过敏反应和溶血。

youdao

Other countries--In Europe, after the 1929 crash, they had a different reaction to the scandals and problems of the '20s and it wasn't as favorable to markets as in the U.S.

929大崩盘之后,欧洲的一些国家,却对于丑闻及20年代出现的问题,有着不同的反应,欧洲政府采取的措施并不如美国那样,有利于市场发展

耶鲁公开课 - 金融市场课程节选

But, I think what most of you, actually having MIT come to MIT, have probably realized is sometimes it's nice to major in a science, because you can't just pick up a reaction and do it in your kitchen on the weekend, where as you can sometimes join a book group and do that.

但我认为对你们大多数人来说,既然来了,可能已经意识到最好是主修一门科学,因为你不能在你,周末的时候在厨房里做化学实验,然后你就可以参加一个读书俱乐部。

麻省理工公开课 - 化学原理课程节选

So delta u of reaction is approximately equal T to negative Cv for the calorimeter times delta T.

所以反应的ΔU近似等于,负的量热计的Cv乘以Δ

麻省理工公开课 - 热力学与动力学课程节选

She said it wasn't a reaction to a recent petition on Change.org by a Mississippi teenager.

WSJ: Gatorade to remove controversial ingredient

The founder and CEO, Dave Neeleman, says its own Passenger Bill of Rights isn't necessarily a reaction to the threat of federal action.

NPR: JetBlue Offers Passengers Rights, Compensation

You don't have a reaction?

WHITEHOUSE: Press Briefing