他是数学系的导师。

He is a tutor for the math department.

Source: Tatoeba

Sentence Composition

1 他 tā
  1. (third-person singular) (since the early 20th century, usu. male) he; him; his
  2. (bound form) other; another; some other (as in 他日 tārì and 他人 tārén)
=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 数学 shùxué mathematics
=4 系 xì
  1. to connect
  2. to relate to
  3. to tie up
  4. to bind
  5. to be (literary)
=4 系 xì
  1. system
  2. department
  3. faculty
=4 系 jì
  1. to tie
  2. to fasten
  3. to button up
=4 系 xì
  1. to connect
  2. to arrest
  3. to worry
=5 的 de
  1. of; ~'s (possessive particle)
  2. (used after an attribute when it modifies a noun)
  3. (used at the end of a declarative sentence for emphasis)
  4. (used after a noun, verb or adjective to form a nominal expression, as in 皮革的 pígéde "one made of leather" or 跑堂儿的 pǎotángrde "a waiter (literally, one who runs back and forth in a restaurant)" or 新的 xīnde "new one")
  5. also pr. dì or di in poetry and songs
=5 的 dī a taxi; a cab (abbr. for 的士 dīshì)
=5 的 dí really and truly
=5 的 dì (bound form) bull's-eye; target
6 导师 dǎoshī
  1. tutor
  2. teacher
  3. academic advisor