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adulteration

英/ɐdˌʌltəɹˈeɪʃən/
美/əˌdəɫtɝˈeɪʃən/
01n.

掺杂, 掺假的东西

being mixed with extraneous material; the product of adulterating; the act of adulterating (especially the illicit substitution of one substance for another)