To keep the astronauts and the spacecraft safe, the astronauts must leave and go back to the spacecraft through a special door.

为了保证宇航员和飞船的安全，宇航员必须通过一扇特殊的门离开和返回飞船。

youdao

If you don't feel safe, I can put another lock on your door.

如果你觉得不安全，我可以帮你加个门锁。

youdao

He dropped in on companies unannounced, like a door-to-door salesman, arriving in a "big and safe" Lincoln Town Car he rented in every city. Once, to keep costs low, Gou slept in the backseat.

他对很多公司进行陌生访问，像一个上门的销售员，在很多城市租用林肯城市轿车作为代步工具，常常为了降低消费，他在后座睡觉。

youdao

Well, inside five minutes 6 police cars arrive, sirens wailing and blue lights flashing and an armed response team crash through the front door-to find our burglar, safe and sound, who they duly arrest.

BBC: NEWS | UK | UK Politics | David Davis speech in full

Leave aside the unhappy fact that, in the hue and cry, Ms Bell's 14-year-old daughter learned her mother's true identity as reporters banged at the door of their safe house.

ECONOMIST: The silence of the lambs