点击下方单词,选择对的这个单词
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.
1. waste matter that contaminates the water or air or soil
多通过句子记忆单词，而不是单独死记硬背。
