The solution was as close at hand as the stern of the ship: a large ship controlled its rudder by a special type of automatic feedback loop known as a servomechanism.

• 其实，解决这个问题的方法近在眼前：一艘巨舰，是通过某种特殊的自动反馈回路，即伺服机制来控制它的船舵的。