He has a volatile temper.是什么意思？

He has a volatile temper.

他脾气反复无常。

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。

has

v. 有( have的第三人称单数 )，（亲属关系中）接受，拿，买到；

例句
...the operation a patient has had.
病人做过的手术

volatile

adj. 易变的，不稳定的，（液体或油）易挥发的，爆炸性的，快活的，轻快的；

例句
The international oil markets have been highly volatile since the early 1970s...
从20世纪70年代初开始，国际石油市场就一直很不稳定。

temper

n. 性情，脾气，特征，（钢等）回火，怒气；vt. 调和，使回火，锻炼，缓

例句
He was about to lose his temper but checked himself in time...
他刚要发火，不过又及时克制住了。