This door should only be used in an emergency.

这道门只能在紧急情况下使用。

《牛津词典》

Step 5: Look for an emergency exit or emergency door release switch.

寻找紧急出口或紧急开门按钮。

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If you're fit enough to open the door in an emergency, you can be the first person out.

如果你足够适合在紧急情况下打开这道门，你可以当第一个跑出去的人。

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