To mark 20 years of field study, Conservation International's Rapid Assessment Program has just named the Top 20 "RAP" Stars of the program's history.
为纪念20年的野外调查，国际保育组织的快速评估项目在调查的历史中选出:20最佳“RAP”。
Geology is the study of the Earth's crust. We can understand the history of the Earth through this field.
地质学是对地球地壳的研究。我们可以通过此项领域来了解地球的历史。
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