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

所以咖啡作为剂的使非常重要--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.

但剂也可以起到积极的作。

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力缺陷多动症的知识，可以收看我们制作的有关剂的节目。

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名意大利田径运动员被指控逃避剂检测。

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

可卡因是一种剂，它的许多药效，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.

世界剂机构一向致力于将某些药品拒之体育门外。

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，违了剂使的规定。

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，那么多的运动员都服剂，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.

经过剂调查，（剂是一种违法的提高能力的药物）国际奥委会宣布43名俄罗斯运动员终身禁赛。

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

其中最著名的剂是类固醇，它可以让运动员更大更强。

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

他对允许使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运游泳队进行了过度的剂检测。

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

凭令人瞠目的成绩并不能证明这些记录是由服剂的运动员创造的。

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

这非常适合光合作，而光合作又是剂，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年索契奥运会上支持使剂，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.

如果不进行剂检测，我们的奥运会会变成什么样子？