Towns were crowded and insanitary; people were often malnourished; and disease spread fast.
城镇拥挤肮脏；人们经常营养失调；疾病肆虐传播迅速。
Towns were crowded and insanitary; people were often malnourished; and disease spread fast.
城市既拥挤又不卫生，居民往往营养不良，疾病会迅速传播。
Towns were crowded and insanitary; people were often malnourished; and disease spread fast.
城市既拥挤又不卫生，居民往往营养不良，疾病会迅速传播。
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