名词

1. (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. (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.

1. (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel

2. a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes