be perfectly happy to 心甘情愿

“心甘情愿”，汉语成语，意思是心里完全愿意，没有勉强。多指自愿做出某种牺牲。可以翻译为“be willing to，be perfectly happy to”等。

例句：

为了名声，他心甘情愿牺牲幸福。

He was willing to sacrifice his happiness on the altar of fame.