名词
中文翻译：Unknown
同义词：
['turnaround', 'detour', 'loop']
例句：
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2.
山、路等
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3.
时间或金钱
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1. The hikers took a switchback to avoid the steep incline.
登山者为了避开陡峭的坡度，选择了一段蜿蜒的道路。
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2. The river made a switchback around a bend in the road.
河在路的一个弯道处形成了一个回旋。
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3. The train made several switchbacks before reaching its destination.
火车在到达终点前，经过了几次曲折的路线。