contaminant
US /kənˈtæm.ə.nənt/
UK /kənˈtæm.ə.nənt/

1.
污染物, 雜質
a substance or thing that makes something else impure or polluted
:
•
The factory was fined for releasing harmful contaminants into the river.
該工廠因向河流排放有害污染物而被罰款。
•
Even a small amount of the contaminant can ruin the entire batch.
即使是少量的污染物也能毀掉整批產品。