straight-line vee bottom

例句：

1. 1. The car'sstraight-line vee bottom isdesigned to improve fuel efficiency.
   这款车的直线底设计旨在提高燃油效率。
2. 2. The newmodel has a sleek straight-linevee bottom that makes it look moremodern.
   新款模型拥有光滑的直线底，使其看起来更现代。
3. 3. Theboat's straight-line vee bottom providesexcellent stability in rough waters.
   这艘船的直线底在恶劣的水域中提供了出色的稳定性。