她的手握得越来越紧，指节都变白了。用英语怎么说？

她的手握得越来越紧，指节都变白了。

Her knuckles whiten as she clenches her hands harder.

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。

knuckles

n. （指人）指关节( knuckle的名词复数 )，（指动物）膝关节，踝；v. （指人）指关节( knuckle的第三人称单数 )，（指动物）膝关节，踝；

例句
Brenda's knuckles were white as she gripped the arms of the chair.
布伦达握紧椅子扶手时指关节都变白了。

whiten

vt.& vi. （使某物）变白或更白；

例句
Remove free radicals, relieve stresses, abate fatigue, retain skin moisture durably and whiten skin steadily.
清除游离基, 舒缓压力, 减轻疲劳感觉, 帮助肌肤保湿持久,平稳美白.

as

adv. 同样地，一样地，例如；prep. 作为，以…的身份，如

例句
As far as I can recall, Patti was a Smith.
我记得帕蒂是姓史密斯的。

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。

clenches

v. 紧握，抓紧，咬紧( clench的第三人称单数 )；

例句
Her knuckles whiten as she clenches her hands harder.
她的手握得越来越紧，指节都变白了。

hands

n. 手( hand的名词复数 )，人手，（工具等的）把，帮助；

例句
He lifted his hands above his head...
他将双手举过头顶。

harder

adj. 更困难的，更坚固的，更硬的；adv. 更努力地；

例句
I was the first to ask him awkward questions but there'll be harder ones to come...
我是第一个向他提出尴尬问题的人，不过还会有人问更难回答的问题。