Doses divided into tiny portions among millions of people are not the same as those concentrated on a few people, Dr. Schauer said.
分散到数百万人的微小剂量与集中与几个人的剂量是不同的，Schauer博士说。
Methods to establish acute radiation damage pattern, C57BL mice in SPF grade were divided into different groups by different ways and irradiation doses.
方法实验动物均选用SPF级C57 BL小鼠，用不同药物和不同照射剂量处理后，建立急性放射损伤模型。
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