英汉词典

1. 污染物（尤指车辆尾气和工业有毒化学废弃物）
    Pollutants are substances that pollute the environment, especially gases from vehicles and poisonous chemicals produced as waste by industrial processes.

pollutant的意思

    e.g. A steady stream of California traffic clogs the air with pollutants.
           加利福尼亚川流不息的车流使空气中充斥着污染物。