in relief; a relief; to one's relief的区别. 英语
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【答案】 in relief：显著地；鲜明地；浮雕一般.【网络释义】如释重负地；轻松地
Movie-crazy audiences across the country sighed in relief when film producer Mukesh Bhatt announced the end of the strike Friday morning.
He returned home in relief whenhe got the news that had passed the exam.
a relief:【（令人）如释重负或慰藉的人或事】
What a relief 那就放心了
It is a great relief to have rain after a long time of drought.长期的干旱之后有雨是一大慰藉
to one's relief：令……感到放心的是；使某人欣慰的是
To the parents' relief,their daughter was admitted into a key university .