Combined with the still widespread use of coal burners to heat homes, China has the world's highest emissions of sulphur dioxide and a quarter of the country endures acid rain.
加上家庭供暖普遍使用煤炉，中国有着世界最高的二氧化硫排放量并且国内四分之一地区遭受酸雨侵害。
2
The combined technology of coagulative precipitation-iron chippings filtering-alkaline separation was ed to purify the high concentration sulphur dyeing sewage.
采用混凝沉淀-铁屑过滤-碱析组合工艺处理高浓度硫化染色废水。
3
The study investigated the effects of nitrogen and sulphurcombined application on kernel starch of the wheat variety Yumai 50 with weak gluten under field circumstances.