The resulting solution was cooled on an ice bath and 130 ml. of concentrated hydrochloric acid was added drop wise.
将得到的溶液在冰水中冷却，并将130毫升浓硫酸逐滴滴入。
The resulting solution was cooled on an ice bath and 130 ml of concentrated hydrochloric acid was added drop wise.
将得到的溶液在冰水中冷却，并将130毫升浓硫酸逐滴滴入。
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