contaminate
/kənˈtæməˌneɪt/
make impure
Chinese meaning: 污染；弄脏
Industrial waste often contaminates rivers and lakes, harming aquatic life.
工业废物经常污染河流湖泊，危害水生生物。
The food was contaminated with bacteria, causing a major health scare.
食物被细菌污染，引发了一场重大的健康恐慌。