He hastily changed his subject.是什么意思？

He hastily changed his subject.

他匆匆换了个话题。

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。

hastily

adv. 匆忙地，仓促地，匆猝，草草，率尔；

例句
The Government hastily organized defensive measures against the raids...
政府急忙布置了防卫措施抵御空袭。

changed

[医]变化的，改变的；

例句
Since the Sixties, afforestation has changed the Welsh countryside.
60年代以来，植树造林已经改变了威尔士的乡村面貌。

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。

subject

n. 主题，话题，学科，科目，[哲]主观；adj. 须服从…的，（在君主等）统治下的；v. 提供，提出，使…隶属；

例句
The subject of the talk is announced a week in advance.
会谈的主题已提前一周宣布。