積分方程 jī fēn fāng chéng

DEFINITIONS

  1. integral equation (math.)

CHARACTERS

積 jī accumulate, store up, amass
分 fēn
HSK 1
divide; small unit of time etc.
方 fāng
HSK 3
a square, rectangle; a region; local
程 chéng
HSK 4
journey, trip; schedule, agenda