在化学课上，我们做了一些小实验。

Zài huàxué kè shàng, wǒmen zuò le yìxiē xiǎo shíyàn.

In chemistry class, we did a few small experiments.

科学家对病毒进行了一些实验。

Kēxuéjiā duì bìngdú jìnxíng le yìxiē shíyàn.

Scientists conducted some experiments on the virus.

我们需要进行一些实验来验证理论。

Wǒmen xūyào jìnxíng yīxiē shíyàn lái yànzhèng lǐlùn.

We need to conduct some experiments to validate the theory.