劳动力的人口构成也发生了变化.

The mix of the labour force has also changed.

贫困的人口构成也发生了变化。

The demography of poverty has also shifted.

考虑到这样的人口构成，Zhang的收入提升目标就显得尤为困难。

This makes Mr Zhang’s income-boosting goal an especially tough one.

“增长的极限”模型把世界上的污染、人口构成、以及资源的占有统统看作是划一的。

The Limits to Growth model treats the world as uniformly polluted, uniformly populated, and uniformly endowed with resources.