下雨使空气变得清新了。

The rain had freshened the air.

《牛津词典》

空气质量不如以前那么清新了，河流也变得很脏。

The quality of air isn't clean as before. The river is becoming dirty.

youdao

空气质量不如以前那么清新了，河流也变得很脏。

The quality of air isn't clean as before. The river is becoming dirty.

youdao