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来源：雅诚德英语网
In 1870 he changed his view, and measures were enacted that caused the disease to decline.
1870年，他改变了观点并制定了促使疾病传播下降的措施。
In 1870 he changed his view, and measures were enacted that caused the disease to decline.
1870年，他改变了观点并制定了促使疾病传播下降的措施。