在其他条件相同的情况下，这意味着他们必须开拓出比农学家更大的土地面积，以获得相同数量的食物、衣服和其他必需品。

All else being equal, this means they must exploit larger areas of land than do agriculturalists to secure the same amount of food, clothing, and other necessities.

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在自愿捐赠的条件下，当居民人数增加时，公园的面积将减少。

Under voluntary contributions, as the neighborhood grows in number, the size of the park shrinks.

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目前面临的主要困难有生活及公共卫生条件差、疾病监控体系大面积受损、进入受灾严重地区的渠道有限等问题。

Major challenges include poor living and public health conditions, largely destroyed disease monitoring and containment systems and limited access to some of the worst-hit areas.

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