Şunu aradınız:: contaminant (İngilizce - Japonca)

contaminant
コンタミネーション

foreign contaminant.
汚染物質

clear the contaminant?
汚染物質を排除ね

analysis. foreign contaminant.
検査 汚染物質

but seriously, we should deal with the contaminant.
実際のとこ、なんとかしないとな。

no, no, it's not that-- that kind of contaminant.
その手の汚染物質ではない

so exactly what kind of contaminant are we dealing with here?
その汚染物質って つまり何なんだ？

the batch will be good for nothing if we don't clear the contaminant.
汚染物質を除去しないと これも無駄になる

if it thinks there's any danger of a contaminant escaping, - the whole place just shuts down.
全システムの停止で 汚染物質が漏れ出す危険性がある

occupational exposure to air contaminants
職業性大気汚染曝露