For a century, this land had been overgrazed by livestock, like most grasslands around the world.

这就像世界各大部分草一样，经历了长达一个世纪的过放牧。

Elk were overgrazing the grassland, causing damage to the precious eco-system.

麋鹿在草原上过啃草，对宝贵的生态成了破坏。

Sharks limit the abundance of animals which would otherwise overgraze these essential plants.

鲨鱼限制了动物的数量，否则这些动物会过放牧这些重要植物。