I was so nervous since it was my second trial.

这是我的第二次试验，我很紧张。

youdao

But I was so nervous since it was my second trial.

但我很紧张，因为这是我的第二次试验。

youdao

They didn't know if they responded correctly or incorrectly after each trial because there was no reward or punishment.

因为没有奖励或惩罚，他们不知道每次试验后自己的回答是正确的还是错误的。

youdao

She was part of the clinical trial that did this, and they gave everybody certificates after it was done.

她当时就在参与疫苗的临床试验,试验后他们会给每个参与者颁发一个证明

耶鲁公开课 - 生物医学工程探索课程节选

The clinical trial was designed such that almost two million elementary school children were given this test vaccine.

该临床试验的计划是,向近二百万的小学学生,接种这种测试疫苗

耶鲁公开课 - 生物医学工程探索课程节选

So she got a certificate at the end thanking her for participating in the clinical trial, and also telling her to go get the real vaccine because she hadn't had it yet.

试验最后,她得到了一个证明其参与,这项临床试验的证书,并且被告之要去注射真的疫苗,因为她还没有被注射过

耶鲁公开课 - 生物医学工程探索课程节选