他擅长解答数学难题。

He is good at solving complicated mathematical problems.

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 擅长 shàncháng to be good at; to be expert in
3 解答 jiědá
  1. to solve (a problem)
  2. to resolve (a difficulty)
  3. to provide an answer
  4. solution
  5. resolution
  6. answer
4 数学 shùxué mathematics
5 难题 nántí difficult problem