酸雨不是自然现象。

Acid rain is not a natural phenomenon.

Acid rain isn't a natural phenomenon.

Source: Tatoeba

Sentence Composition

1 酸雨 suānyǔ acid rain
=2 不是 bùshì
  1. no
  2. is not
  3. not
=2 不是 bùshi fault; blame
3 自然现象 zìránxiànxiàng natural phenomenon