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
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the kitchen was the hub of family life .厨房是家庭生活的中心。
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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
"early 16th cent. (denoting a shelf at the side of a fireplace used for heating pans): of unknown origin (compare with