查词历史：
- rudders rubble work rubbish
n.
1.
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(船的)舵，方向舵 A rudder is a device for steering a boat. It consists of a vertical piece of wood or metal at the back of the boat.
2.
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(飞机的)舵，方向舵 An aeroplane's rudder is a vertical piece of metal at the back which is used to make the plane turn to the right or to the left.
