Professional institutions have sampled, tested and tracked those connected to the case.

专业机构已对相关人员进行采样检测和跟踪管理。

Fifteen-year-old Valieva reportedly had three different substances in her drug test sample.

据报道，在15岁的瓦利耶娃的药检样本中含有三种不同的物质。

The only way you'll know that is by actually taking a sample test.

您知道的唯一方法是实际进行样本测试。

If it's on the sample test it's not on the real thing.

因为既然是样题 就肯定不会出现在真题上。

I mean from a book, or from some software, or online there are sample tests available which represent that exam.

我的意思是从一本书，或者从一些软件，或者在线有可用的样本测试代表该考试。

According to one environmental working group analysis, the USDA has found that nearly 70% of conventionally grown produce samples tested positive for pesticide residues.

根据一项环境工作组的分析，美国农业部发现，近 70% 的传统种植农产品样品的农药残留检测呈阳性。

If you look at the sample tests that have been provided, the answers provided by the students here are like 75 words on average.

如果你看一下已经提供的示例题，这里的学生提供的回答平均有 75 个单词。

This reaction produces a change in color, indicating that the sample tested positive and that the individual has been exposed to the virus.

这种反应会导致颜色发生变化，表明样本检测呈阳性， 并且该人已接触过该病毒。

Last week what appeared to be a leaked food inspection report from Gansu surfaced online showing sample tests on pork products from 11 producers including Sanquan.

上周，一份泄露的甘肃食品检测报告在网上曝光，显示包括三全在内的11家猪肉生产商的猪肉产品的抽样检测。