素原促進 sù yuán cù jìn

DEFINITIONS

  1. antigen (medicine)

CHARACTERS

素 sù
HSK 5
white (silk); plain; vegetarian; formerly; normally
原 yuán
HSK 4
source, origin, beginning
促 cù
HSK 5
urge, press, hurry; close
進 jìn advance, make progress, enter