He was crippled by polio as a child.是什么意思？

He was crippled by polio as a child.

他幼年患过小儿麻痹症，结果腿就瘸了。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

was

v. 用来表示某人或某物即主语本身，用来表示某人或某物属于某一群体或有某种性质（ be的过去式 ），在，存在，不受干扰；

例句
There was a terrible sadness in her eyes...
她眼神中流露出深深的悲伤。

crippled

adj. 跛腿的，残废的；

例句
They tried to avoid looking at his grotesque face and his crippled body.
他们尽量不去看他那张奇丑无比的脸和残疾的身体。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

polio

n. <医>脊髓灰质炎（等于poliomyelitis）；

例句
The first authoritative study of polio was published in 1840...
关于小儿麻痹症的第一篇权威性研究报告发表于1840年。

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。

child

n. 小孩，孩子，幼稚的人，产物，弟子；

例句
The older child should be able to prepare a simple meal...
那个年纪稍大的孩子应当会做一顿简单的饭菜。