公公
husband's father; grandpa; eunuch
公共
public; common; communal
公共事业
public utility; state-run enterprise; public foundation or enterprise, often charitable
公共交换电话网路
public switched telephone network; PSTN
公共交通
public transport; mass transit
公共安全罪
crime against public order
公共汽车
bus; CL:輛|辆[liang4],班[ban1]
公共汽车站
bus stop; bus station
公共行政
public administration
公共设施
public facilities; services
公共道德
public morality; social ethics
公共零点
common zeros (of system of equations)