declivity

n.

斜坡；坡度；下斜；

1. Franz and the count in their turn then advanced along the same path, which, at the distance of a hundred paces, led them over a declivity to the bottom of a small valley.
   弗兰兹和伯爵也顺着这条小径向前走去，走了约一百步，他们就到了一片通到一个小谷底去的斜坡上。

A Method of Construction Declivity Survey
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Fast and self-adaptive image segmentation using extended declivity
Study on the theory and accuracy of declivity survey in the method of small angle measurement
Method and Accuracy of Circular Construction Declivity Survey Based on Intelligent Total Station
Analysis of the Diversity Using DEM Numeral Elevation Model Calculating Declivity
Zonation of flora and vegetation of the Northern declivity of the Karakoram/Kunlun mountains (SW Xinjiang China)
Adequacy of the Penman-Monteith method to irrigated surface with different exposures and declivity.