以下为句子列表：
英文: An early hypothesis by Chakraborti holds that the arsenic is associated with iron pyrites and enters the aquifers by an oxidation process.
中文: 加卡波狄较早提出的一个假说认为，砷与黄铁矿结合并透过氧化作用进入含水层。
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英文: In view of the defects in GB, a novel method was proposed after many experiments to accurately measure the content of pyrites sulfur derived from coal.
中文: 摘要针对国标法难以准确测定含量高达40%左右的煤系硫铁矿中硫化铁硫的不足，通过多次试验提出一个可以准确测定高含量煤系硫铁矿中硫化铁硫的方法。
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