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1. Oxford Dictionary

   filtration

   • IPA[fɪlˈtreɪʃn]

   英式

   • n.
     the action or process of filtering something

   • noun: filtration, plural noun: filtrations

2. • 釋義

   n.

   名詞

   • 1. the action or process of filtering something small particles are difficult to remove without filtration