农田生产力的提高使一些国家在粮食和牲畜方面能自给自足，并为防止饥荒提供了有效的保护。
The increased productivity from farmland made some countries self-sufficient in grain and livestock, and offered effective protection against famine.
维持卫生和其他社会支出水平，对于保护生命和提高生产力至关重要。
Maintaining levels of health and other social expenditures is critical to protect life and livelihood and to boost productivity.
维持卫生和其他社会支出水平，对于保护生命和提高生产力至关重要。
Maintaining levels of health and other social expenditures is critical to protect life and livelihood and to boost productivity.
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