根据中国和美国官方公布的数字，2004年，北京大气中的可吸入颗粒物浓度是纽约的6倍多，二氧化硫浓度是纽约的两倍多。
In 2004, levels of airborne particulate in Beijing were more than six times as high as in New York, and sulfur-dioxide levels were more than double, according to Chinese and U.S. government figures.
1991年皮纳图火山爆发时释放了超过20亿多吨的二氧化硫进入大气，致使两年左右气温下降了1度半。
The Mount Pintaubo eruption in 1991 released more than 20 million tons of sulfur dioxide into the atmosphere, causing a drop in temperature by half a degree Celsius for about two years.
这两种硫酸和二氧化硫的企业已经进行了注册，并符合ISO 9001 2008质量体系标准，已获得犹太批准。
Both sulphuric acid and sulphur dioxide businesses are registered and meet the ISO 9001 2008 quality system standard, and have been given kosher approval.
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