名词
中文翻译：渐变段
同义词：
['gradational section', 'transitional section例句：1. The gradient section of the road is steep and difficult to navigate.（这条路的渐变段陡峭且难以驾驶。）']
例句：
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1. The gradient section of the road is steep and difficult to navigate.
这条路的渐变段陡峭且难以驾驶。
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2. The gradient section of the bridge is designed to allow for easy passage of vehicles.
这座桥的渐变段设计成便于车辆通行。
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3. The gradient section of the river changes rapidly from one side to the other.
这条河的渐变段从一边到另一边变化迅速。