The air was so clean.

空气很干净。

The air is fresh here.

这里的空气很新鲜。

The air will be clean.

空气将会变得干净。

The air is badly polluted.

空气污染严重。

The air was very clear and fresh.

空气非常清新。

The air pollution is getting worse.

空气污染越来越严重。

It was great, and the air was so clean.

天气很好，空气很干净。

John watched the woman talking to the air.

约翰看着那个女人对着空气说话。

The pollution from factories filled the air.

工厂的污染充满了空气。

Maybe there'll be traffic jams in the air.

也许空中会有交通堵塞。