书架后面存在一个秘密通道。

A secret passage existed behind the bookshelf.

秘密通道隐藏在两堵墙之间。

The secret passage is hidden entre the two walls.

他们在山中发现了一个秘密通道。

They discovered a secret passage in the mountains.

秘密通道隐藏在那幅旧画后面。

The secret passage was hidden behind the old painting.

书架后面的秘密通道是可发现的。

The secret passage is discoverable behind the bookshelf.

这座城堡有许多秘密通道。

This castle has many secret passages.

这个地牢有很多秘密通道。

This dungeon has many secret passages.

他们决定打开通往秘密通道的入口闩。

They decided to unbar the entrance to the secret passage.

有趣地是，这座老房子墙后有秘密通道。

Intriguingly, the old house had secret passages behind the walls.

总统通过议会大楼下面的秘密通道逃走了。

The President escaped through a secret passage underneath the parliament building.