名词
中文翻译：入口
同义词：
['in', 'out', 'entrance', 'exit']
例句：
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1. The factory has two main entrances and one main exit.
这个工厂有两个主要的入口和一个主要的出口。
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2. The train will stop at the station for passengers to get off and on.
火车将在车站停靠，供乘客上下。
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3. The tunnel is designed to allow vehicles to enter and exit without obstructing traffic.
隧道的设计是为了允许车辆进入和退出，而不阻碍交通。