She drove up a steep grade and then began the long descent into the desert.
她驾车爬上一个陡坡，然后开始长长的下坡进入沙漠。
Based on special experiments, this paper is devoted to several technical issues of run - away of freight trains during long detention on electrified steep grade and associated countermeasures.
结合专门试验论述了货物列车在大坡道上长时间停留时溜逸与防溜的若干技术问题。
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