adj.粉化的，无光的（搪瓷缺陷）；n.起霜； 英英释义： chalk[ tʃɔ:kt ]n.a soft whitish calcitea pure flat white with little reflectancean amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and