The emergency exit is at the back of the bus.

紧急出口在公共汽车的尾部。

《牛津词典》

There is no emergency back-up immediately available.

没有立即就能获得的后备。

《柯林斯英汉双解大词典》

She chooses a chair with its back to the room near an emergency exit, so no one except me can see her face.

她选择了一张背对房间、靠近紧急出口的椅子，所以除了我没有人能看到她的脸。

youdao

Poland refused, blocking access to the bus's narrow aisle as at least 21 children escaped out of the back emergency door, according to police.

CNN: STORY HIGHLIGHTS

Now, as Wall Street firms finish paying back their emergency loans, Fannie and Freddie will be costing taxpayers billions for years to come.

FORBES: Back off, Bureaucrats

Well the purpose of the promissory notes is for IBRC to pay back the Emergency Liquidity Assistance (ELA) loaned to it by the Central Bank of Ireland.

FORBES: How Much Would Ireland Benefit from Replacing the Promissory Notes with a Long-Term Bond?