他們是人類。

They are human.

Source: Tatoeba

Sentence Composition

1 他們 tāmen they; them
=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 人類 rénlèi
  1. humanity
  2. human race
  3. mankind