名词
中文翻译：内通道
同义词：
['internal passage', 'inner tunnel']
例句：
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1. The engineer designed the inner passage to be narrow enough for only one person to pass at a time.
工程师设计的内部通道足够窄，只能允许一个人同时通过。
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2. The inner passage was lined with intricate carvings of mythical creatures.
内部通道被神话生物的精美雕刻装饰着。
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3. The inner passage is often used as an emergency exit in buildings during emergencies.
在紧急情况下，内部通道通常用作建筑物的紧急出口。