In case of any other emergency, an oxygen mask will come down from overhead.
如果遇到其它紧急情况时，会从头顶上方落下一个氧气面罩。
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An oxygen mask will come down from overhead in case of emergency.
如果发生紧急情况，头顶上会放下一只氧气面罩。
An oxygen mask will come down from overhead in case of an emergency.
若发生紧急情况，头顶上会放下一只氧气罩来。
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