| 释义 |
〔steamship〕A large vessel propelled by one or more steam-driven screws, propellers, or paddles.汽船：靠一个或多个蒸汽螺旋浆推进的大船〔spiral〕A three-dimensional curve that turns around an axis at a constant or continuously varying distance while moving parallel to the axis; a helix.螺旋：当螺旋浆沿轴转动时，形成的以等距离或不断变化之距离绕轴转动的三维曲线〔skeg〕An arm extending to the rear of the keel to support the rudder and protect the propeller.舵底承：用以支撑舵和保护螺旋浆的，延伸在龙骨后部的支撑物 |