rainforest       
noun [ C or U ] uk/ˈreɪn.fɒr.ɪst/ us/ˈreɪn.fɔːr.ɪst/
B1 热带雨林
a forest in a tropical area that receives a lot of rain
  a tropical rainforest 一片热带雨林 
 - More examples
 - They plundered the rainforest for its natural riches.
 - The Amazon river basin contains the world's largest tropical rainforest.
 - Many people are very concerned about the destruction of the rainforests.
 - Heedless destruction of the rainforests is contributing to global warming.
 - Many plant and animal species are found only in the rainforests.