Is a necessary contribution to its subsistence. 对于生存都是必需品

227. Education is a rare privilege.
     教育是一件稀罕的特权
228. Children are a family's only asset,
     孩子是家庭的唯一资产
229. As long as every extra pair of hands...
     因为每多一双手
230. Is a necessary contribution to its subsistence.
     对于生存都是必需品
231. The earth feeds people, clothes them...
     地球给予人类衣食
232. And provides for their daily needs.
     提供日常所需
233. Everything comes from the earth.
     一切都源于地球

来自《家园 第一部分 Home Part1》第 230 行