She is a devout Roman Catholic.

她是虔诚的天主教徒。

youdao

Mr Studzinski is a devout Roman Catholic.

斯图津斯基先生是虔诚的罗马天主教徒。

youdao

Said to be a devout Roman Catholic, he had asked a local priest to be his spiritual adviser and to offer solace in his final hours.

BBC: News Online

Fitzgerald, a devout Roman Catholic, opposes all forms of abortion.

CNN: Candidate Profile from Congressional Quarterly

Rick Santorum, a devout Roman Catholic who made his faith central to his presidential bid, blamed higher education for the declining number of young people who identify as Christians.

CNN: When Christians are their own worst enemies