Their one purpose of speed over the great ocean routes was achieved by perfect balance of spars and sails to the curving lines of the smooth black hull (Samuel Eliot Morison).

• 他们靠把桅和帆完美地平衡到黑色平滑船壳的曲线上实现了快速驶过大洋的目的（塞缪尔 艾略特 莫里森）。