At last she decided to unbosom herself to her mother, and shared her secret sorrow.是什么意思？

At last she decided to unbosom herself to her mother, and shared her secret sorrow.

她最终决定把自己心里的悲伤告诉她母亲.

at

prep. （表示位置）在，在（某时间或时刻），以，达， 向，朝；n. 阿特（老挝辅币单位，100 阿特 = 1 基普）；

例句
Prices start at £13.95 a metre for printed cotton...
印花棉布以每米13.95英镑的价格起售。

last

n. 末尾，最后，上个，鞋楦（做鞋的模型）；vt. 经受住，到…之后，够用，足够维持（尤指某段时间）；adj. 最近的，最后的，最不可能的，惟一剩下的；vi. 持续；adv. 上一次，最近一次，最后；

例句
The last French king was Louis Philippe, who abdicated in 1848.
法国末代国王是1848年逊位的路易·菲力普。

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。

decided

adj. 清楚的，坚决的，明显的，明白无误的；v. 下决心( decide的过去式和过去分词 )，（使）决定，解决，裁决；

例句
The scheme's investors, fearful of bankruptcy, decided to abandon the project.
因为担心破产，该计划的投资者决定放弃这个项目。

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。

unbosom

v. 吐露心事，剖明心迹；

例句
At last she decided to unbosom herself to her mother, and shared her secret sorrow.
她最终决定把自己心里的悲伤告诉她母亲.

herself

pron. （反身代词）她自己，（用以加强语气）她亲自，她本人；

例句
She was old enough to absent herself from the lunch table if she chose...
她长大了，可以自己做主不来吃午餐了。

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。

mother

n. 母亲，妈妈，女修道院院长，大娘；vt. 像母亲般地照顾，养育，溺爱；

例句
I felt I had adjusted to the idea of being a mother very well...
我感到自己已经完全接受了当妈妈的想法。

and

conj. 和，与，而且，于是，然后，因此；

例句
I spend a lot on expensive jewelry and clothing...
我花很多钱购买昂贵的首饰和衣服。

shared

adj. 共享的，共用的；

例句
She tried to ensure her affection was equally shared among all three children.
她尽力确保三个孩子从自己这里分享到同等的爱。

secret

n. 秘密，机密，秘诀，奥秘；adj. 秘密的，机密的，神秘的，隐秘的；

例句
The Party is being degraded by its acceptance of secret donations...
该党因私下接受捐赠而蒙羞。

sorrow

n. 悲痛，悔恨，惋惜，伤心事；vt.& vi. 悲痛，遗憾；

例句
As he looked at Katherine, great sorrow clouded his eyes.
他看着凯瑟琳，满眼忧伤。