absent  
 adjective uk/ˈæb.sənt/ us/ˈæb.sənt/
  (NOT PRESENT)      
 B1 (尤指上课或工作)缺勤的;缺席的;不在场的
not in the place where you are expected to be, especially at school or work
  John has been absent from school/work for three days now. 约翰到现在已经旷课/旷工三天了。 
 We drank a toast to absent friends. 我们为没能来的朋友举杯祝福。 
 - More examples
- If a child is absent, the teacher notes it down in the class register.
- The teacher called the roll to see if any students were absent.
- I was absent from work on that day.
  (NOT EXISTING)      
  不存在的;缺乏的
not existing
  Any sign of remorse was completely absent from her face. 她脸上没有一丝自责的神情。 
   (NOT PAYING ATTENTION)     
 心不在焉的;走神的
used to describe a person or the expression on a person's face when they are thinking about other things and are not paying attention to what is happening near them
 absent       
 preposition  US uk/ˈæb.sənt/ us/ˈæb.sənt/
 缺乏;没有
without
  Absent a detailed plan, the project was doomed from the start. 由于缺乏详尽的规划,这项工程从一开始就注定要失败。 
 absent      
verb uk/æbˈsent/ us/æbˈsent/
absent yourselfformal (尤指上课或工作时)缺席,缺勤,不在场
to not go to a place where you are expected to be, especially a school or place of work
  You cannot choose to absent yourself (from work/school) on a whim. 你不能随意旷工/旷课。 
 With a brief apology, he absented himself from the table.
 I took the opportunity to absent myself from the room.
 She made a habit of absenting herself from the family.
 The school is not responsible - these pupils chose to absent themselves.