This place looks like a den of thieves.

这地方看起来像个贼窝。

He accidentally discovered a den of thieves.

他无意中发现了一个贼窝。

Their house is suspected to be a den of thieves.

他们的家被怀疑是一个贼窝。

This is a den of thieves.

这是一个贼窝.

He has made his house a den of thieves.

他把自己的家变成了一个贼窝.

And said unto them, It is written, My house shall be called the house of prayer; but ye have made it a den of thieves.

对他们说，经上记着说，我的殿必称为祷告的殿。你们倒使他成为贼窝了。