His misfortune preys upon his mind.是什么意思？

His misfortune preys upon his mind.

他的不幸使她心中苦恼.

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

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

misfortune

n. 不幸，厄运，不幸的事，灾难；

例句
That's probably the most bare and bleak island I've ever had the misfortune to clap eyes on...
那可能是我不幸看到的最光秃、最荒凉的岛屿。

preys

v. 掠食( prey的第三人称单数 )，掠食，折磨，（人）靠欺诈为生；

例句
Wolf preys on various animals, securing some by craft, some by strength, and some by fleetness.
狼捕食各种动物, 有的用狡计, 有的用强力, 有的靠捷速.

upon

prep. 在…上面，当…时候；

例句
...the doctrine of absolute monarchy based upon divine right.
以神权为基础的君主专制学说

mind

n. 心，精神，心力，知，智力，智慧，心胸，头脑，人，愿望，目的，意向，意志，决心，见解，意见，记忆，记性，记忆力，回想；vi. 介意，注意；vt. 专心于，介意，愿意做，照顾；

例句
A hypnotist can act upon the unconscious mind directly.
催眠师能直接作用于无意识思维。