absent与absence区别是什么,举例说明

Absent:
（形容词）1.不在现场；不存在,缺乏
The part was rudimental or absent.
2.不注意,健忘
What is commonly called an absent man is commonly either a very weak or a very
affected man.
（动词）1.远离,离开
Absence:
（名词）1.远离一个人或地方的时段
2.当被需要时不能出现
He had an absence of enthusiasm.
3.缺乏,缺少
4.不专心于眼前的事物
Recently he is not paying attention,looks like he is absence of mind.