亚马逊是世界上最大的热带雨林。

The Amazon is the world's largest tropical ___rain ___forest.

我们在徒步穿越雨林时听到了许多奇异的鸟叫声。

We heard many exotic birds while hiking through the ___rain ___forest.

保护雨林对我们的星球至关重要。

Protecting the ___rain ___forest is important for our planet.