备用车胎 bèiyòngchētāi spare tire Origin Definitions Defs Strokes Stroke Words Sentences Sents 备用 備用 bèiyòng adjective reserve; spare; backup to keep in reserve for future use; ready for use as a backup or standby车胎 車胎 chētāi tire a rubber tire for vehicles like bicycles, cars, or tractors; consists of inner and outer layers and helps absorb shocks