This area is one of the largest intact ecosystems or biological environments in the world.

该地区是世界上最大的完整生态系统或生物环境之一。

It is, in fact, what is called the largest intact ecosystem of its type in the world, these two parks combined.

事实上，这两个公园加起来就是世界上同类中最大的完整生态系统。

The intricate relationship between the male orchid bee and the flowers is the reason that brazil nut trees like this one can only grow in intact rainforest ecosystems.

雄性兰花峰和花朵的关系是巴西胡桃树为什么只能在原始的热带雨林生态中生长的原因。