savanna

An adult male lion is resting in the grass on the Kenyan savanna.

肯尼亚热带草原上，一头成年雄狮正在草丛里休息。

The herders shifted south, following the major river systems into savanna regions.

牧民们向南迁移，沿着主要河流系统进入热带草原地区。

Increase in pastureland and subsequent overgrazing have resulted in an expansion of savanna.

草场的增加和随之而来的过度放牧导致了稀树草原的扩张。

In many characteristics, savanna soils are similar to those of some rain forests, though more extreme.

稀树草原的土壤与一些热带雨林的土壤有许多相似的特征，尽管会更极端。

In the book "Secrets of the Savanna", they issued a strong call that Africa should control its population.

在《稀树大草原的秘密》一书中，他们发出了非洲应当控制人口的强烈呼唤。