rudders

A sailor uses the rudder to make the ship go in the correct direction.

水手用舵导航。

An oar often acts as rudder.

桨常可起舵的作用。

Turn the rudder slightly so that we can ease the boat round.

慢慢掌舵, 这样我们就能使船稳稳去。

II. Operational principles of airplane flying attitude: mainly reflected in the ailerons ,elevons and rudder operation system.

二、飞机飞行态的操作原理——映在副翼、升降翼、方向舵操作系统里。