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Phosphoric acid was selected as bond to make phosphate rock powder into ball material.
研究选用磷酸作粘结剂，使碎磷矿粉粘结成型。
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The second phosphate is attached to the first by a high-energy bond.
其中第二个磷酸以高能键与第一个磷酸结合。
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The second phosphate is attached to the first by a high-energy bond.
其中第二个磷酸以高能键与第一个磷酸结合。
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