请帮帮翻译一段长话hydrogen peroxide in sodium percar ...? also the active oxygen concentration (from hydrogen peroxide in sodium percarbonate) can be obtained and accurate volumetric analysis (of hydrogen peroxide by reducing ceric salts to cerous salts or by liberating iodine from an iodide, followed by titration with a thiosulfate solution). 总体是and连接的并列句,黑体为两个并列句的主语,但奇怪第二个句子无法判定是谓语动词遗漏(比如followed 前少了be动词)还是省略(比如solution最后也暗含着can be obtained),总之缺少明确的谓语结构,请lz核对。。。查看更多