变质作用 biàn zhì zuò yòng

DEFINITIONS

  1. metamorphism (geology)

CHARACTERS

变 biàn
HSK 3
change, transform, alter; rebel
质 zhì
HSK 4
matter, material, substance
作 zuò
HSK 1
make; work; compose, write; act, perform
用 yòng
HSK 3
use, employ, apply, operate; use