He had an upset stomach...是什么意思？

He had an upset stomach...

他胃不舒服。

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。

an

art. 一（在元音字母前代替不定代词a），一任一某一，一个；

例句
He started eating an apple...
他开始吃苹果。

upset

vi. 打翻，弄翻，打乱，打搅；vt. 打乱，搅乱，推翻，弄翻，使心烦意乱，使翻倒；n. 翻倒，颠覆，心烦意乱，混乱；adj. 难过的，失望的，沮丧的，（肠胃）不舒服的；

例句
They may also be friends of the chairman, so they are reluctant to upset the applecart.
他们也可能是主席的朋友，所以他们不愿从中作梗。

stomach

n. 胃，腹部，食欲，欲望；vt. 容忍，吃…吃得津津有味，〈古〉对…发怒；

例句
Acids in the stomach destroy the virus.
胃酸能杀死病毒。