名词
中文翻译：中位数开口
同义词：
['median gap', 'median width']
例句：
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1.The median opening of the tunnel is 20 meters wide.
隧道的中位数开口宽度为20米。
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2. The median opening between two cities is about 50 kilometers.
两个城市之间的中位数开口大约是50公里。
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3. The median opening of the road is too narrow for vehicles to pass through.
这条道路的中位数开口太窄，车辆无法通过。