佩伦说：“地表覆盖物可能经历过大规模的变化，致使火星变成了目前的地形。”

"There could have been a massive change in the distribution of mantle," Perron said, "which would have caused the planet to shift into its current position."

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通过自制土壤冲蚀槽，并进行人工模拟降雨试验，研究了稻秆编织地表覆盖物对坡地土壤侵蚀和小麦产量的影响。

Effects of rice straw covering net on soil erosion and wheat yield were studied with self-designed soil erosion boxes under simulated rainfall.

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