Sports top court says there was insufficient evidence to prove doping.

体育最高法院表示俄罗斯运动员服用兴奋剂的证据不足。

The IOC will react with zero tolerance.

国际奥委会对兴奋剂采取零容忍的态度。

But stimulants can play a positive role, too.

但兴奋剂也可以起到积极的作用。

If you want to learn more about ADHD, you can watch our episode about stimulants.

如果你想了解更多关于注意缺陷多动症的知识，可以收看我们制作的有关兴奋剂的节目。

And nicotine is a stimulant, so avoid them too late in the day.

而且尼古丁是一种兴奋剂，所以不要深夜。

Twenty six Italian track and field athletes have been accused of evading drug tests.

26名意大利田径运动员被指控逃避兴奋剂检测。

And finally 11. Feeling withdrawal symptoms from stimulants.

11. 对兴奋剂产生戒断症状。

The United States Anti-Doping Agency says Russia's punishment doesn't go far enough.

美国反兴奋剂机构称对俄罗斯的惩罚还不足够。

He was found guilty this week of systematic doping violations.

本周，阿尔贝托o萨拉查被裁决有罪，违反了兴奋剂使用的规定。

She was being investigated by the United States Anti-Doping Agency, USADA.

她正接受美国反兴奋剂机构USADA的调查。

It's really shocking that so many athletes today have taken dopes to be more energetic.

为了有更充沛的体，那么多的运动员都服用兴奋剂，真是令人震惊。

The most well-known performance enhancers are steroids, drugs that can make athletesbigger and stronger.

其中最著名的兴奋剂是类固醇，它可以让运动员更大更强。

Millions of people take performance enhancing drugs such as caffeine and vitamins every day.

成千上万的人们每天都在服用咖啡因，维他命之类的兴奋剂。

So he could figure out how to drug-test pigeons-and catch dopers in the act.

这样他就能了解如何对鸽子进行药物测试，并当场捉住服用了兴奋剂的赛鸽。

He opposed admitting players to the Hall of Fame if they had used performance-enhancing drugs.

他反对允许使用兴奋剂的球员进名人堂。

Now, caffeine could be said to be the last legal performance enhancing drug.

咖啡因可以说是最后一种法的兴奋剂了。

It was banned by the World Anti-Doping Agency only at the start of the year.

米屈肼今初才被世界反兴奋剂机构列禁止药物类型。

Between 2011 and 2015, and possibly for longer, Russia systematically doped hundreds of athletes.

在2011至2015间，甚至可能更久，俄罗斯对数百名运动员进行了系统性的兴奋剂注射。

This is perfect for photosynthesis and photosynthesis is dope, Hello phytoplankton productivity!

这非常适光作用，而光作用又是兴奋剂，您好，浮游植物的生产！

It follows an investigation into allegations of state-sponsored doping at the 2014 Sochi Olympic Games.

俄罗斯被指控在2014索契奥运会上支持使用兴奋剂，此项禁令紧随该调查之后。