Hub

(noun.) the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes.

(noun.) a center of activity or interest or commerce or transportation; a focal point around which events revolve; 'the playground is the hub of parental supervision'; 'the airport is the economic hub of the area'.

编辑:沃尔夫冈

• Fastened to each of the twin wheels was a steel hub 16 feet in diameter. 佚名. 神奇的知识之书.
• The Morrow hub brake, which applies friction to the rear wheel hub by back pressure on the pedal, is a popular modern form. Edward W. Byrn. 十九世纪发明进展.
• As well get excited because a central hub drives a hundred outer wheels or because the whole universe wheels round the sun. 戴维·赫伯特·劳伦斯. 恋爱中的女人.
• This armature consists of coils or bobbins of insulated wire, each section having its terminals connected with separate insulated plates on the hub, which plates are known as the commutator. Edward W. Byrn. 十九世纪发明进展.
• A three-legged spider connected the metal rim of each front wheel to a brass hub, upon which rested a collecting brush. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• The wheels had heavy cast iron hubs with wooden spokes and rims and wrought iron tires, and the frame was of wood placed outside the wheels. Edward W. Byrn. 十九世纪发明进展.
• When they were finally and completely stalled, the wheels dug in to the hubs, we left them in the field and started on foot for Udine. 欧内斯特·海明威. 永别了,武器.

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