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1. Oxford American Dictionary

   contaminant

   • IPA[kənˈtamənənt]

   美式

   • n.
     a polluting or poisonous substance that makes something impure

   • noun: contaminant, plural noun: contaminants

2. • 釋義

   n.

   名詞

   • 1. a polluting or poisonous substance that makes something impure people were exposed to airborne contaminants