Only US firefighters and repairmen can use the buttons to speed up the door-closing process if they have a code or special keys.

只有美国消防员和维修人员有密码或者特殊的钥匙时，他们才能按按钮加速关门的过程。

youdao

She ran with all speed back to the little door: but, alas!

她飞快地跑回小门那儿去：但是，哎呀！

youdao

Then I speed the return of dormitory, Nahao keys, bag, close the bedroom door, and then with the crowd Xialou.

然后我速度的返回寝室，拿好钥匙，包，关上寝室门，然后随着人群下楼。

youdao

Mr Brine, who lives next door to Mr Cobbin, said "everyone thinks it's all speed but it's not".

BBC: Two damaged cars

What we're talking about here -- the speed of light --is a million times faster, and is opening the door to a complete rethinking of what we mean by, and can do with, photography.

CNN: A camera that can see around corners

And it is a work in progress, which must constantly debate its direction, its speed and its geometry, and which must soon change its rules to accommodate the applicants at its door.

ECONOMIST: What is Europe?