noun 下载 🔗分享 污染物,污染源。 A foreign substance that makes something dirty, or impure, especially waste from human activities. Examples : "Factory chimneys released pollutants into the air, making it difficult to breathe. " 工厂的烟囱向空气中排放污染物,使得呼吸变得困难。 environment substance 与AI对话词汇游戏阅读练习