彼は若い頃から音楽に対して強い熱情を抱いている。
He has had a strong passion for music since he was young.
彼女は熱情を込めて自分の理想を語った。
She spoke of her ideals with passion.
研究への熱情が、長い下積みの時代の彼を支え続けた。
His passion for research sustained him through his long years of obscurity.
手紙には彼女への熱情があふれていた。
The letter overflowed with his ardor for her.