It’s quite understandable that she was annoyed.是什么意思？

It’s quite understandable that she was annoyed.

她被惹恼了, 这很能理解。

quite

adv. 相当，很，非常，确实如此；

例句
For a novelist, that's quite an accomplishment...
对于一位小说家来说，那是相当了不起的成就。

understandable

adj. 能懂的，可理解的，可同情的；

例句
Taxes are unpopular — it is understandable that voters are against them...
税收不受欢迎——选民们反对是可以理解的。

that

det. 那个，那；pron. 那个，那；conj. 多么，如此…以至，用于某些动词、形容词和名词后，引出各种从句；adv. 不那么，那样；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

she

pron. 她，它；

例句
Her lover walked out on her after she had aborted their child.
她的情人在她打掉胎儿后甩了她。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

annoyed

adj. 恼怒的，气恼的；v. 使烦恼，使恼怒，干扰，打扰(annoy的过去式和过去分词)；

例句
It annoyed me that I didn't have time to do more reading...
腾不出时间多看会儿书让我很烦。