论文部分内容阅读
Tropical rainforests are the most diverseecosystem(生态系统) on Earth,and also theoldest.Today,tropical rainforests cover only 6percent of the Earth’s ground surface,but theyare home to over half of the planet’s plant andanimal species.In this completely uniqueworld,there are thousands of species wehaven’t even discovered yet.
Tropical rainforests are the most diverseecosystem (ecosystem) on Earth, and also theoldest.Today, tropical rainforests cover only 6percent of the Earth’s ground surface, but theyare home to over half of the planet’s plant andanimal species. In this completely uniqueworld, there are thousands of species wehaven’t even discovered yet.