Scientific evidence on the distribution of cancer in the population can be obtained through carefully planned and executed epidemiological studies.
通过慎重计划和开展的流行病学研究，可获得关于癌症在人群中分布情况的科学依据。
Scientific evidence on the distribution of cancer in the population can be obtained through carefully planned and executed epidemiological studies.
通过慎重计划和开展的流行病学研究，可获得关于癌症在人群中分布情况的科学依据。
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