起着泡沫的

例句：

1. 1. The milk was foaming over the sides of the glass.
   牛奶从玻璃杯边缘冒泡。
2. 2. The bubbles in the drink were so big they looked like little islands.
   饮料里的气泡大到看起来像小岛。
3. 3. The foam on top of the cake was a sign that it was ready to be served.
   蛋糕顶部的泡沫表示它准备好了可以上桌了。