I've heard of ground-level ozone but can you explain what it is exactly?

我听说过近地面臭氧，但是你能确切解释一下是什么吗？

youdao

I've heard of ground-level ozone but can you explain what it is exactly?

我听说过近地面臭氧，但是你能确切解释一下是什么吗？

youdao