螺旋桨是一种螺旋扇叶结构，利用船舶主机产生的动力来推进船舶。船舶在水中如何运动？这是最常见的问题之一。最直接的答案是：船舶主机产生的动力传递至螺旋桨，转化为驱动船舶向前的推力。

        A propeller is a rotating fan-like structure which is used to propel the ship by using the power generated and transmitted by the main engine of the ship. That's the most straightforward answer for one of the most common questions asked about ships - How Ship Run in Water? or How does ship move in water?