hubs

例句:

• He was already buffing the car's hubs.
  他已经在擦汽车轮毂了。
  
• I greased front and rear hubs and adjusted the brakes.
  我在前后轮毂上都抹了润滑油，还调校了刹车。
  
• Shafts and hubs are usually fastened together by means of keys.
  轴和轮毂通常用键固定在一起.
  
• We need regional hubs, not an expanded Heathrow.
  来自THETIMES
• State police also were increasing their presence at transportation hubs.
  来自WSJ
• There are only a few super hubs on many smaller ones.
  来自SA