half-bubble

例句：

1. 1.The half-bubble of water rose to the surface.
   水面上冒出了半泡水。
2. 2. The bubbles in the drink were a sign of carbonation.
   饮料里的气泡是碳酸的证明。
3. 3.The bubbles burst and the liquid returned to its original state.
   气泡破裂，液体又恢复了原状。