Soils of farmlands used for growing crops are being carried away by water and wind erosion at rates between 10 and 40 times the rates of soil formation, and between 500 and 10,000 times soil erosion rates on forested land:
2017 지방직 9급 B책형 8번 문제인데요 이 문장에서
at rates between 10 and 40 times the rates of soil formation, and between 500 and 10,000 times soil erosion rates on forested land
이 부분이 구문 분석이 안되네요
1. times를 어떻게 해석하면 좋을까요?
2. 그리고 at rates 이하의 문장을 어떻게 해석하나요?