chamber

这间石室充满了神秘的氛围。

This stone ___chamber is full of mystery.

枪手迅速将子弹装入左轮手枪的弹膛。

The shooter quickly loaded the bullet into the revolver's ___chamber.

议员们在议会厅里通过了这项重要的法案。

The lawmakers passed this important bill in the ___chamber.