罗马的地下墓穴中排列着许多古代基督徒的坟墓。

The ___catacombs in Rome contain rows of tombs from ancient Christians.

我们在罗马参观了著名的地下墓穴，那里有许多古老的隧道和墓室。

We visited the famous ___catacombs in Rome, which have many ancient tunnels and burial chambers.