A challenge trial works faster because researchers control exposure, instead of waiting for people to get sick.

挑战试验的效果更快， 因为研究人员控制了暴露，而不是等待人们生病。

We are owned by a publicly listed business that were very supportive of our trial, but we have to prove to them that the trial works.

我们隶属于一家公开上市的企业， 该公司非常支持我们的试验，但我们必须向他们证明该试验有效。

There was something like a sigh from the folk in the village at the news; foolish folk, they did not understand what a trial working was, that it was only working on trial, but so it was.

听到这个消息，村民们发出了类似叹息的声音。愚蠢的人，他们不明白试工是什么，那只是试工，但事实就是如此。