他让她感念一生。用英语怎么说？

他让她感念一生。

He had won her undying gratitude...

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

won

v. 获胜，战胜（ win的过去式和过去分词 ）；

例句
His abrasive manner has won him an unenviable notoriety...
他生硬粗暴的态度让他声名狼藉。

her

pron. (she的宾格)她，(she的所有格)她的，她，指某个国家，（一艘）船；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

undying

adj. 不死的，不朽的，永恒的；

例句
...declarations of undying love.
至死不渝之爱的告白

gratitude

n. 感激，感谢，感激的样子，谢意，恩义；

例句
Relief and gratitude were written all over his face...
他一脸释然与感激。