Her absence is due to illness.是什么意思？

Her absence is due to illness.

她因病缺席。

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。

absence

n. 缺席，缺勤，缺乏，缺少，无，心不在焉，不注意；

例句
The presence or absence of clouds can have an important impact on heat transfer...
有无云层对热量的传递会产生重要的影响。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

due

adj. 由于，适当的，预定，到期；n. 应有的权利，应得到的东西，应缴款；adv. 正向，正对着；

例句
He is due to address a conference on human rights next week.
他下星期将在一个大会上发表关于人权的演说。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

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。