常见例句Ammonium persulfate and sulfuric acid were used to turn completely the polyphosphoric acid into orthophosphoric radicals, which were then determined by spectrophotometry.可用過硫酸銨和硫酸將多聚磷酸全部轉化成正磷酸根，再用分光光度法測定其質量分數。 返回 polyphosphoric