When you take off, jump in backward and sidewaysmotion.
当你开始时候,向后起跳,侧转。
2
Pivoting on a pin inside the hull, it swings down to provide ballast and resistance against sidewaysmotion of the boat caused by the wind blowing from one side.
它围绕船底的一个钉子旋转,放下时提供压载力,以抵抗由于单侧风导致的船只侧向摆动。
3
All sailboats need a keel of board for this reason: the narrow, flat surface of the board or keel produces little drag when the boat moves forward but resists motionsideways.