那不久以前还是繁茂的森林。

Which formerly was rich and thick so.

youdao

他们只知道那里曾经什么也没有，而现在是繁茂翠绿的森林。

They only knew that where there once had been nothing, now a lush green forest.

youdao

然后去沼泽地，进入世界上物种最繁茂的亚马逊森林，感受热带雨林的奥秘。

And then you will visit the rain forest, one of the richest worldwide.

youdao

然后去沼泽地，进入世界上物种最繁茂的亚马逊森林，感受热带雨林的奥秘。

And then you will visit the rain forest, one of the richest worldwide.

youdao