想说服她简直是徒劳。用英语怎么说？

想说服她简直是徒劳。

It's hopeless trying to convince her.

hopeless

adj. 不抱希望的，绝望的，没有希望的，惨淡的，不可救药的，不可能的；

例句
I knew I was going to make it — that I wasn't a hopeless case.
我就知道自己能挺过去——我还没到山穷水尽的地步。

trying

adj. 令人难于忍受的，难堪的，令人厌烦的；v. 试图( try的现在分词)，试验，尝试，审讯；

例句
Caroline was trying on one outfit after another.
卡罗琳一套接一套地试穿衣服。

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。

convince

vt. 使相信，说服，使承认，使明白，使确信，使悔悟，使认错[罪]；

例句
The waste disposal industry is finding it difficult to convince the public that its operations are safe.
废物处理行业发现很难让公众相信其操作是安全的。

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。