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。
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。
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