Olympic officials are trying to avoid a doping scandal.

奥林匹克官员正在努力避免兴奋剂丑闻。

The trainer himself admitted doping four others.

驯马师承认还给另外4匹马也服过。

A 250,000-dollar donation amid lingering questioins about whether he was doping or not.

关于他是否服用疑问已经有一份250，000美元捐赠。

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证据不足。

We have a 100% policy against doping.

我们有一个100%反对使用兴奋剂政策。

Another study, published in 2018, simply asked more than 2,000 athletes whether they were doping.

2018年发表另一项研究只简单询问了2000多名运动员是否服用了兴奋剂。

The decision followed a long investigation into the alleged doping of Russian athletes.

经过国际奥委会长期对俄罗斯运动员使用兴奋期调查，他们这样决定。

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，违反了兴奋剂使用规定。

You'll understand what chemists mean when they talk about " doping."

而当化学家谈论“掺杂质”时候，你也会明白他们在讲什么。

And that's a critical component in this fight against doping.

而检举是反兴奋剂行动中重要组成部分。

WADA called for the ban after confirming that the Russian government worked to cover up doping among its athletes.

确认俄政府试图掩盖运动员使用兴奋剂一事后，WADA呼吁奥委会对俄罗斯运动员赛。

Russian officials have denied any state involvement in the doping of athletes.

俄罗斯官员否认任何关于国家参与运动员兴奋剂事件指控。

We begin, though with the biggest sports doping story since Lance Armstrong.

我们从始于兰斯·阿姆斯特朗最大体育兴奋剂丑闻开始今天节目。

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。

Russia was initially given a four-year ban by the World Anti-Doping Agency.

世界反兴奋剂机构最初对俄罗斯赛四年。

OK. Well, this scandal of Russian state-sponsored doping already led to Russia's track and field athletes being banned.

好。俄罗斯由国家运行兴奋剂计划已经致俄罗斯田径队被赛。

Ling Lin is with the doping control department of the Beijing 2022 organizing committee.

凌琳是2022年冬奥组委反兴奋剂部门负责。

Russia was suspended last November after a report accused it of state sponsor doping.

去年11月，俄罗斯田径被指发生自上而下服行为，并因此而遭到赛处罚。

The World Anti-Doping Agency banned use of meldonium at the beginning of 2016.

2016年初，世界反兴奋剂组织开始用米屈肼。

Silicon doping involves incorporating impurities into a crystal that mess up its electron balance.

所谓硅掺杂就是将能破坏电荷平衡杂质混入晶体。