She is unaccustomed to public speaking.是什么意思？

She is unaccustomed to public speaking.

她不习惯于当众演说。

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。

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。

unaccustomed

adj. 不习惯的，不寻常的，奇怪的，不熟悉的；

例句
The point is that people grew unaccustomed to thinking and acting in a responsible and independent way. Herein lies another big problem.
关键是人们已不再习惯以一种负责任的、独立的方式去思考和行动。这其中就存在另一个大问题。

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。

public

adj. 公众的，公共的，公开的，政府的，人人知道的，知名的；n. 大众，社会，公共场所，（文学家等的）爱读者；

例句
The public never had faith in his ability to handle the job...
公众从来不相信他有能力胜任这一职位。

speaking

n. 说话，讲话，谈话，演讲；adj. 演讲的，富于表情的，（肖像）栩栩如生的，雄辩的；v. 讲，谈(speak的现在分词 )；

例句
The Prime Minister was speaking ahead of today's meeting.
首相在今天的会议开始之前作了发言。