他們對天文學十分感興趣。

They are very interested in astronomy.

Source: Tatoeba

Sentence Composition

1 他們 tāmen they; them
2 對 duì
  1. right; correct
  2. towards; at; for
  3. concerning; regarding
  4. to treat (sb a certain way)
  5. to face
  6. (bound form) opposite; facing; matching
  7. to match together; to adjust
  8. to fit; to suit
  9. to answer; to reply
  10. to add; to pour in (a fluid)
  11. to check; to compare
  12. classifier: couple; pair
3 天文學 tiānwénxué astronomy
4 十分 shífēn
  1. very
  2. completely
  3. utterly
  4. extremely
  5. absolutely
  6. hundred percent
  7. to divide into ten equal parts
5 感興趣 gǎnxìngqù to be interested