prodigal son 浪子；悔改的罪人；回头的浪子；改邪归正的人

【例句】
How did it happen? Like the prodigal son, he finally came to himself.
尼布甲尼撒王就像浪子一样，终于醒悟过来。

All that flies right out the window the minute the prodigal son waltzes back in.
他的浪子儿子一回头一切都前功尽弃了