彩虹是一種自然現象。

A rainbow is a natural phenomenon.

Source: Tatoeba

Sentence Composition

1 彩虹 cǎihóng rainbow

classifier: 道
=2 是 shì
  1. to be (followed by substantives only)
  2. correct; right; true
  3. (respectful acknowledgement of a command) very well
  4. (adverb for emphatic assertion)
=2 是 shì variant of 是 shì
3 一種 yīzhǒng one kind of; one type of
4 自然現象 zìránxiànxiàng natural phenomenon