名词
中文翻译：双重螺旋
同义词：
['double spiral', 'double helix']
例句：
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1. The two-tier winding of the road leads to a beautiful park.
这条路的双层螺旋通向一个美丽的公园。
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2. The DNA double helix structure is crucial for understanding genetics.
DNA双螺旋结构对于理解遗传学至关重要。
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3. The two-tier winding river flows through the city, providing fresh water for the people.
这条双层螺旋河流穿过城市，为人们提供淡水。