the central part of a wheel, rotating on or with the axle, and from which the spokes radiate 毂 ■a place or thing which forms the effective centre of an activity, region, or network (活动,地区或网络的)中心 the kitchen was the hub of family life. 厨房是家庭生活的中心。
常用词组 hub-and-spoke
denoting a system of air transportation in which local airports offer flights to a central airport where international or long-distance flights are available (空中交通)辐射状的
语源
early 16th cent. (denoting a shelf at the side of a fireplace used for heating pans): of unknown origin (compare with hob)