Chemical composition of a P2O5 rich concretion from the Challenger expedition...
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Among the geological discoveries of the end of the 19th century, one of the most remarkable and certainly most important from the economic point of view, is that lime phosphate...
在19世纪末的地质学发现中，从经济价值角度而言最引人注目且无疑最为重要的成果之一，便是磷酸钙（lime phosphate）的相关发现……
