So, the use of coffee as a stimulant became important -- it wasn't just a drink people drank in the morning, for breakfast.

所以咖啡作为兴奋剂的使用非常重要--它不只是早晨人们作为早餐要喝的东西。

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.

如果你想了解更关于注意力缺陷症的知识，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，所以不要深夜摄入。

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

26名意大利田员被指控逃避兴奋剂检测。

Cocaine is a stimulant, and many of its effects, like increased heart rate, cause the body to need more oxygen.

可卡因是一种兴奋剂，它的效，比如心率加速，会导致身体对氧气的更大需求。

The campaign team are calling him senile, saying he needed performance enhancing drugs. And he skipped over that low bar.

竞选团队称他老朽，称他需要服用兴奋剂。但是他后来的表现确实超出了人们的期望。

The World Anti-Doping Agency works to keep certain drugs out of sports.

世界反兴奋剂机构一向致力于将某些品拒之体育门外。

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。

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

为了有更充沛的体力，那么的员都服用兴奋剂，真是令人震惊。

After an investigation into alleged doping, illegally taking drugs to perform better, the International Olympic Committee banned 43 Russian athletes for life.

经过反兴奋剂调查，（兴奋剂是一种违法的提高能力的物）国际奥委会宣布43名俄罗斯员终身禁赛。

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，它可以让员更大更强。

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

他反对允使用兴奋剂的球员进入名人堂。

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

咖啡因可以说是最后一种合法的兴奋剂了。

The International Testing Agency (ITA) confirmed on Friday that related reports from the US have led to the excessive anti-doping tests on the Chinese Olympic swimming team.

国际检测机构（ITA）上周五证实，美国的相关报道导致对中国奥游泳队进行了过度的兴奋剂检测。

Eye-popping performance alone does not prove records were set by doped athletes.

单凭令人瞠目的成绩并不能证明这些记录是由服用兴奋剂的员创造的。

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

这非常适合光合作用，而光合作用又是兴奋剂，您好，浮游植物的生产力！

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

俄罗斯被指控在2014年索契奥会上支持使用兴奋剂，此项禁令紧随该调查之后。

But this wasn't reported to Russia's anti-doping agency until February after she helped her team win a gold medal, Valieva was suspended from these Olympics.

但直到今年2月，在她帮助她的团队赢得金牌后，这件事才被报告给俄罗斯反兴奋剂机构，之后瓦利耶娃被禁赛了。

And what kind of an Olympics could we have without testing for drugs.

如果不进行兴奋剂检测，我们的奥会会变成什么样子？