frothing oil

例句：

1. 1. The foaming oil was used to create a smooth surface on the cake.
   泡沫油被用来在蛋糕上创造出平滑的表面。
2. 2. The frothing agent in the milk made it easier to mix.
   牛奶中的起泡剂使混合变得更容易。
3. 3. The frothing agent is added to the mixture to create a creamy texture.
   起泡剂被添加到混合物中，以创造奶油般的质地。