ship velocity的用法和样例：
例句
- This greatly reduced the speed of the ship, for there was a danger that if she traveled too quickly, this rudder would be torn away as well.
船员用备用的木板在船上赶制了一只应急用的舵，并克服重重困难将舵安装就位，这样一来，大大降低了船的航速。 - The direction and point of action of the hydrodynamic force have a close correlation with the bevel angle from stern, and a little with the vessel velocity.
水动力的方向和水动力作用点的位置随航速的改变而改变，但变化幅度不大，受尾斜角影响较大。
