the economy seemed like a natural and equitable alliance. 经济似乎是自然平衡的联盟

220. For a long time, the relationship between humans and the planet...
     很长一段时间里 人类和地球的关系
221. Was evenly balanced.
     是平衡的
222. For a long time,
     很长一段时间里
223. the economy seemed like a natural and equitable alliance.
     经济似乎是自然平衡的联盟
224. But life expectancy is short,
     但是人类寿命是短暂的
225. And hard labor takes its toll.
     艰苦劳作要付出代价
226. The uncertainties of nature weigh on daily life.
     不确定的自然界加重了生活的负担

来自《家园 第一部分 Home Part1》第 223 行