A mass of bubbles of air or gas in a matrix of liquid film, especially an accumulation of fine, frothy bubbles formed in or on the surface of a liquid, as from agitation or fermentation.

 
  • 泡沫一種在液體表面或內部由於攪動或發酵起泡形成的輕而發白且成微細泡沫狀的物質
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