common oil公用油系统commonadj.常见的；共同的；普通的；平常的；平凡的；粗俗的n.公地；平民；普通；公园common souliea rhizome or herb黄三七common spoken Chinese teaching普通话教学common application environment共同使用环境common buckwheat stem and leaf荞麦秸common control echo suppressor集中控制回波抑制器Common supply and exhaust duct公用给排气烟道common cold due to fire-evil火伤风common papermulberry branchlet楮茎common-mode input resistance[电] 共模输入电阻Common resources for education公共教育资源