海豚是哺乳動物。

A dolphin is a mammal.

Source: Tatoeba

Sentence Composition

1 海豚 hǎitún dolphin
=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 哺乳動物 bǔrǔdòngwù mammal