名词
中文翻译：门的活页部分
同义词：
['flip-door', 'hinged door']
例句：
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1.The flap-door on the back of the car is designed to keep the engine cool.
汽车后部的活页门设计用来保持发动机冷却。
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2.The flip-door on the kitchen cabinets allows easy access to the shelves.
厨房橱柜上的活页门方便地打开，可以轻易到达架子上。
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3.The hinged door at the entrance was damaged during the storm.
入口处的铰链门在风暴中受损了。