In addition to writing on bones, the Chinese also made marks on turtle shells.
除了在骨头上写字，中国人还在龟壳上做标记。
This paper reports a new method to identify the Chinese drug turtle shells using PCR product direct sequencing method.
用PCR产物直接测序法对中药材龟甲（板）进行鉴别。
Avoid all products and souvenirs made from animals, including all fur, ivory, shells, seahorses, teeth, rhino horn and turtle shell products.
拒绝一切用动物做成的产品和纪念品，包括皮草，象牙，贝壳，海马，动物牙齿制品，犀牛角和龟壳制品。
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