He escaped through a secret door.

他是从一个暗门逃走的。

youdao

One of the curtains was tied back to reveal a secret door into another small room.

我们走进屋里，只见帘子挂在墙上，其中一个已卷好，露出一个暗门，通向另一间小屋子。

youdao

Suddenly a secret door opened in the wall. I had managed to work out the secret of the lock.

突然墙上的一道秘门打开了，我已经设法解决了锁的秘密。

youdao

His own wine cellar is an unheated spot under the stairs accessed by a secret door that looks like it's a part of the wall.

WSJ: Michael Graves, Drinking Wine With Lettie Teague

If the various Toy Story incarnations opened a door to the secret life of playthings, this book goes one step further by providing a touching, behind-the-scenes look from the minds that created it all.

FORBES: Beachside Bookworm: The Toys Are Back in Town

The running takes place in narrative limbo, since no one else on the spaceship seems aware of her plight, and she stumbles on a pivotal secret through an open door that should, by the logic of the plot, have been sealed and triple-locked.

WSJ: Prometheus, Madagascar 3, Peace, Love & Misunderstanding | Stunning Space, Careless Craft | Film Reviews by Joe Morgenstern