Helen's poor sight incapacitates her for working as taxi driver.是什么意思？

Helen's poor sight incapacitates her for working as taxi driver.

海伦视力不行,这使她不能胜任出租车司机的工作.

poor

adj. 贫穷的，贫乏的，令人怜悯的，可怜的，匮乏的，低劣的；n. the poor 贫困者，穷人；

例句
I suppose the shock had addled his poor old brain.
我估摸这个打击已经把他那可怜的脑袋瓜搞糊涂了。

sight

n. 视力，看见，视野，景象；vt. 看见，发现，瞄准，观察，调准瞄准器；vi. （用仪器）瞄准，观察；

例句
There are places you can take physically handicapped children where staff don't blanch at the sight of a wheelchair.
有些地方你能带残疾儿童去，那里的工作人员不会一看到轮椅就退缩。

incapacitates

v. 使无能力，使不适合( incapacitate的第三人称单数 )；

例句
The drug incapacitates the person and causes memory lo.
这种药物使人浑身无力并且导致记忆丧失.

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。

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

例句
I've come looking for a bit of advice.
我特来讨教。

working

adj. （涉及）工作的，（人）有工作的，（时间）用于工作上的，（想法等）可作为基础的；v. （使）工作( work的现在分词)，（使）运作，运转，（使）产生效果；n. 工作，活动，制作，操纵；

例句
The workforce have recently been calling for their working hours to be reduced. Many companies have accordingly switched to a five-day week.
工人们最近一直在呼吁缩短工作时间。许多公司于是转成了一周五天工作制。

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。

taxi

n. 出租车，滑

例句
He caught a taxi to Harrods.
他打了辆出租车去哈罗德百货商店。

driver

n. 驾驶员，司机，驱动器，驱动程序，驱逐者，驱赶者，（高尔夫球）球棒；

例句
They were astonished to find the driver was a six-year-old boy.
令他们吃惊的是，开车的居然是个6岁的小男孩。