1. He is a renowned demonologist who has studied and documented various demonic entities throughout history.
他是一位著名的恶魔学家，研究并记录了历史上各种恶魔实体。
2. The protagonist in the novel sought the help of a demonologist to rid herself of the supernatural presence in her house.
小说中的主人公寻求了一位恶魔学家的帮助，以消除她家中的超自然存在。