As for the oracle bones, the climate on Mexico's coast is wet and humid, and the soil is acid. Very few human bones from that period have survived--how could we expect turtle shells and animal scapulae to be preserved for so long?
至於龜甲獸骨，墨西哥灣沿岸潮濕多雨，土壤呈酸性，因此連當時的人骨都少有保存，又怎能期待龜甲與獸骨保留至今？