sea-water density

例句：

1. 1. The ship's captain decided to adjust the sails to increase sea-water density.
   船长决定调整帆，以增加海水密度。
2. 2. The scientist measured the salinity of the sea-water to determine its density.
   科学家测量了海水的盐度，以确定其密度。
3. 3.The fisherman used a net to catch more fish by increasing the sea-water density.
   渔民使用网来提高海水密度，从而捕获更多的鱼。