So, he did an experiment on his gardener's son, nine-year-old James Phipps.

于是，他在他园丁的儿子，九岁的詹姆斯·菲普斯身上做了一个实验。

Maybe I did an experiment on myself without even knowing it.

也许我在自己身上做了一个实验， 甚至都不知道。

You talked about, we need to do an experiment on this.

你谈到， 我们需要对此做一个实验。