To test that out, the researchers conducted a control experiment, in which they broadcast some non-buzzy bats sounds.

为了检验，研究人员在对比实验中播放了某些非嗡嗡叫的蝙蝠叫声。

Some experiments control the plasma with magnetic fields inside a massive metal donut called a tokamak.

一些实验通过称为托卡马克的巨大金属环内的磁场来控制等离子体。

We have the first early results on productivity from these tools and one is a controlled experiment that was done with people writing business writing.

我们得出了这些工具的首个生产力结果，其中一个是让人们写商业文章的对照实验。

I had a great difficulty finding a job, so I went off to Livermore Lab to do controlled fusion plasma physics experiments.

我很难找到工作，所以我去了利弗莫尔实验室做受控聚变等离子体物理实验。