名词
中文翻译：斜坡线
同义词：
['slope', 'gradient']
例句：
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1.The slope of the hill is steep, making it difficult to climb.
这座山的坡度很陡，爬起来很困难。
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2. The gradient of the road is steep, which makes driving dangerous.
这条路的坡度很大，开车很危险。
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3.The slope line on the map indicates the direction of the river.
地图上的坡度线指示了河流的方向。