相平面

xiàngpíngmiàn
phase plane (math., ordinary differential equations)

CEDICT

math

Entry Composition

1 相 xiàng
  1. appearance
  2. portrait
  3. picture
  4. government minister
  5. (physics) phase
  6. (literary) to appraise (esp. by scrutinizing physical features)
  7. to read sb's fortune (by physiognomy, palmistry etc)
2 平面 píngmiàn
  1. plane (flat surface)
  2. print media