Some coal is rich in heavy metals, and burning it in electric power stations, incinerators, steel mills, and motor vehicles may produce air pollution containing the metals.是什么意思_Some coal is rich in heavy metals, and burning it in electric power stations, incinerators, steel mills, and motor vehicles may produce air pollution containing the metals.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句