In a relatively brief period the archaeological record is reduced to mere scraps of stone, bone, glass, metal, and earthenware.
在短时期内，能留下考古记录的东西也都会退化为石头、骨头、玻璃、金属和陶器的碎片。
Some scientists suspect that the collagen comes from bacteria rather than dinosaurs, but others are investigating collagen as a way to bar-code scraps of unidentifiable bone.
一些科学家怀疑这些胶原蛋白来自细菌，而不是恐龙，但其他一些科学家仍把研究胶原蛋白作为了解条码碎片——无法辨别的骨头的方式。
The archaeological records are based on scraps of stone, bone and earthenware.
考古学的记录基于对一些石头、骨头和陶器的碎片的研究。
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