以外力地质作用、困难度指数和地表切割密度作为公路地貌二级区划的主导指标；
Based on those works, the index system of landform regionalization of highway in China was developed.
泥层以及其中的微生物可以帮助地质学家了解深海海床之前所经历的外力作用。
The layers of mud and microbes help geologists understand forces at work on the ocean bottom deep in the past.
泥层以及其中的微生物可以帮助地质学家了解深海海床之前所经历的外力作用。
The layers of mud and microbes help geologists understand forces at work on the ocean bottom deep in the past.
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