催化作用 cuī huà zuò yòng

DEFINITIONS

  1. catalysis

CHARACTERS

催 cuī
HSK 5
press, urge
化 huà
HSK 3
change, convert, reform; -ize
作 zuò
HSK 1
make; work; compose, write; act, perform
用 yòng
HSK 3
use, employ, apply, operate; use