单词	周圍三里
释义	同ABOUT
随便看	ppm-- parts per million ppm--parts per million ppm; parts per million ppm--parts per millom ppm-- part（s） per million ppm; part（s） per million ppm-- pdm--signal ppm, ppm ppm, p.p.m., ppm ppm--pulse position modulation ppm格式 ppm--百万分点 ppm， parts per million ppm，parts per million ppm｛parts per million｝ ppn ppnet ppo p. pocket p. pocket--pharyngeal pouches ppoint or confide to a regency p+-polysilicon gate ppo {polyphenylene oxide} pportunely or in season ppp