Border Points: Each cluster has a limited number of defined "border points" – these are the gateways in and out of the cluster.
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So close in fact, says Cardiff University archaeologist Tudur Davies, that some of these graves have several people in them.
第三十二条 国家支持放射性同位素、射线装置等在工业、农业、生物、医疗卫生、生态环境保护等领域的应用。
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