More than the combined population of all the wealthy nations.

这一数字超过了所有富裕国家的人口总和
Taking from the earth only the strictly necessary.

仅仅向地球索取必需品
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
Was evenly balanced.

是平衡的
For a long time,

很长一段时间里
the economy seemed like a natural and equitable alliance.

经济似乎是自然平衡的联盟
But life expectancy is short,

但是人类寿命是短暂的
And hard labor takes its toll.

艰苦劳作要付出代价
The uncertainties of nature weigh on daily life.

不确定的自然界加重了生活的负担
Education is a rare privilege.

教育是一件稀罕的特权
Children are a family's only asset,

孩子是家庭的唯一资产
As long as every extra pair of hands...

因为每多一双手