In today's chemistry class, our teacher taught us how to carry out an experiment with sulphur dioxide.

今天化学课上，老师带我们做了个关于二氧化硫的实验。

youdao

In today's chemistry class, our teacher taught us how to carry out an experiment with sulphur dioxide.

今天化学课上，老师带我们做了个关于二氧化硫的实验。

youdao