relief表宽慰，安心; 免除的意思，on relief的意思是救济方法。with relief的意思是松一口气；释然；欣慰地
短语
1、relief effort 救灾工作
2、emergency relief 紧急救援；紧急救济
3、relief supplies 救灾物资
示例
I breathed a sigh of relief.
我如释重负地松了口气。
His family has been on relief ever since he died.
自他去世后，他bai的家属一直靠救du济过日子。zhi
