A new Covid contact tracing app is currently undergoing trials – tests to see if it works effectively.

一个新的新冠肺炎联系人追踪应用程序目前正在进行测试——看它是否有效的测试。

There are more than 100 clinical trials testing taVNS, for conditions ranging from PTSD to Parkinson's disease.

有超过 100 项临床试验测试 taVNS，适用于从创伤后应激障碍到帕金森氏病等多种疾病。

Once the FDA approves, the next step is the clinical development or clinical trials, testing in humans, which is a three-phase process.

一旦 FDA 批准，下一步就是临床开发或临床试验，在人体中进行测试，这是一个三阶段过程。

Once we have a candidate vaccine, researchers subject that vaccine to a gauntlet of animal and clinical trial tests to ensure that it's both safe and effective.

当我们有了一种候选疫苗，研究人员会对这种疫苗进行动物试验和临床试验来确保它同时具有安全性和有效性。