收藏或固定紧急出口门，以不妨碍使用该出口；

Stow or secure the emergency exit door so that it will not impede use of the exit;

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接着，他沿着过道走向一扇出口门，门上标记的是，“地下室”。

Then, he moves down the hall to an exit door marked, “BASEMENT.”

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出口门同理可知，因为它是一个返回消息，连接从一个生命线到图的框架，箭头连接框架。

The exit gate is known, because it's a return message that is connected from a lifeline to the diagram's frame with the arrowhead connected to the frame.

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