added buoyant layer

例句：

1. 1.The added buoyant layer has made the boat more stable.
   增加的浮力层使船更加稳定。
2. 2. The engineer added a buoyant layer to the tank to prevent leaks.
   工程师在水箱中增加了一个浮力层以防止泄漏。
3. 3.The new design adds a buoyant layer that helps reduce drag.
   新设计增加了一个浮力层，有助于减少阻力。