精研

jīngyán
  1. to research carefully
  2. to study intensively

CEDICT

  1. (formal) to study carefully
  2. to study carefully

Wiktionary

仔细研究。

重編國語辭典

Entry Composition

1 精 jīng
  1. essence
  2. extract
  3. vitality
  4. energy
  5. semen
  6. sperm
  7. mythical goblin spirit
  8. highly perfected
  9. elite
  10. the pick of sth
  11. proficient (refined ability)
  12. extremely (fine)
  13. selected rice (archaic)
2 研 yán
  1. to grind
  2. study
  3. research

Related entries

钻 zuān
  1. to drill
  2. to bore
  3. to get into
  4. to make one's way into
  5. to enter (a hole)
  6. to thread one's way through
  7. to study intensively
  8. to dig into
  9. to curry favor for personal gain
他在牆上鑽了個洞，把膨脹螺栓塞進去，擰上一顆螺絲，然後在螺絲上掛了一幅阿爾卑斯山的畫。

He drilled a hole in the wall, pushed a Rawlplug into it, screwed in a screw, and hung on the screw a picture of the Alps.

Source: Tatoeba