进一步恶化-降低免疫系统，细菌传染，僵硬的关节，关节炎，更低的生产力，和家庭的营养状态降低。

Further complication - lower immune system, bacterial infection, stiff joints, arthritis, lower productivity, and lower nutritional status of their family.

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对湖泊细菌功能的研究， 主要集中于细菌参与下的湖泊水体生产力和元素的生物地球化学循环过程。

Research on the function of lake bacteria has mainly focused on processes that bacteria are involved in, for example water quality and elemental biogeochemical cycles.

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