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1. Oxford Dictionary

   backflow

   • IPA[ˈbakfləʊ]

   英式

   • n.
     the movement of liquid or air back in the direction it was flowing from

   • noun: backflow

2. • 釋義

   n.

   名詞

   • 1. the movement of liquid or air back in the direction it was flowing from when filling the tank, use an anti-siphon device to prevent backflow the valves prevent backflow of blood into the veins