translation.en: And the way the drug gets tested is through a series of, basically, experiments, through these large, they're called trials, that they do to determine whether the drug is safe and whether it works and all these things.
translation.zh: 测试药性需要进行一系列,大量的 试验 通过这些大量的试验, 来确定药是否安全 以及它是否有用等等