After thinking about it for long time, he realized that the cause of the trouble was that the pulp contained substances with surfactant properties, and the rapidly rotating blades of the beater were carrying a great deal of air into the pulp.
他想了好久，終於明白：漿料中有介面活性物質，打漿機的飛刀快速攪拌，帶進許多空氣，才會把場面弄得那麼狼狽。