He didn’t realize the seriousness of her illness.是什么意思？

He didn’t realize the seriousness of her illness.

他没有认识到她病情的严重性。

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。

realize

vt. 实现，了解，意识到，（所担心的事）发生，以…价格卖出；vt.& vi. 变卖，赚得；

例句
I didn't realize how heavy that shopping was going to be...
我没想到买的东西会有多沉。

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

seriousness

n. 认真，严肃地，严重地，非常严肃地；

例句
The Government has not yet grasped the seriousness of the crisis...
政府当局还没有意识到这场危机的严重性。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

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。

illness

n. 疾病，某种具体疾病，不健康；

例句
Although his mental illness had coincided with his war service it had not been caused by it...
虽然他的精神病刚好在他参战期间发作，但并不是由此引起的。