许多罗马士兵信奉密特拉教，他们在军营中建立地下神殿进行崇拜。

Many Roman soldiers followed ___Mithraism, building underground temples in their military camps for worship.

密特拉教在公元2世纪时在罗马帝国广泛传播。

___Mithraism spread widely across the Roman Empire in the 2nd century AD.

密特拉教的某些仪式和符号可能对后来的罗马帝国宗教产生了深远影响。

Some rituals and symbols of ___Mithraism may have had a profound impact on later religions in the Roman Empire.