His bad eyesight exempted him from military service.是什么意思？

His bad eyesight exempted him from military service.

他因视力不好而免服兵役.

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

bad

adj. 坏的，不好的，严重的，不舒服的，低劣的，有害的；n. 坏人，坏事；adv. 不好地，非常地；

例句
We closed our offices at 2:00 p.m. to give employees time to absorb the bad news.
我们下午两点就放工了，以便给员工时间来慢慢接受这一坏消息。

eyesight

n. 视觉，视力，见解，观察，眼力；

例句
He suffered from poor eyesight and could no longer read properly.
他视力不好，再也不能正常阅读了。

exempted

v. 使免除[豁免]( exempt的过去式和过去分词 )；

例句
Companies with fifty-five or fewer employees would be exempted from the requirements.
员工在55人及以下的公司将免除这些条件。

him

pron. (he的宾格)他；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

from

prep. （表示时间）从…，（表示原因）因为，（表示来源）来自…，（表示分离）与…分离[隔开]；

例句
...an abortive attempt to prevent the current President from taking office.
企图阻止现任总统连任的失败尝试

military

adj. 军事的，军用的，讨厌的，好战的；n. 军人，军队，武装力量；

例句
...a formal statement abjuring military action.
表示放弃军事行动的正式声明

service

n. 服务，服侍，服务业，维修服务，服役；vt. 检修，维修，向…提供服务，保养，满足需要；adj. 服务性的，耐用的，服现役的；

例句
The major service industries should be accountable to their customers.
主要的服务行业应该对它们的顾客负责。