第一起事件发生在2008年12月，两瓶酸性物质被掷往一个很多人正在购置圣诞节物品的步行购物区，造成46人烧伤。
The first incident was in December 2008, when two bottles of acid were hurled into a pedestrian shopping area packed with Christmas shoppers, burning 46 people.
阴极碱性液溶解4B酸粗品，活性炭吸附除去从粗品中溶出的对甲苯胺等杂质，中间区的酸性液使4B酸精品析出。
The p-methylaniline and other impurity in the crude product are adsorbed by active carbon and the purified 4B acid is precipitated out by acidic solution from middle compartment.
区系种类组成丰富，地理成分复杂，酸性土植物优势明显，珍稀濒危植物和特有成分较多。
There are many rare species, complicated geographical composition and the plants in acid soil there.
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