expel  
verb [ T ] uk/ɪkˈspel/ us/ɪkˈspel/ -ll-
  (PERSON)      
  驱逐;除名;开除
to force someone to leave a school, organization, or country
  The new government has expelled all foreign diplomats. 新政府驱逐了所有外交官。 
 My brother was expelled from school for bad behaviour. 我弟弟因为行为不端被学校开除了。 
   (AIR/LIQUID)      
 排出;喷出
to force air or liquid out of something
  She took a deep breath, then expelled the air in short blasts. 她深吸一口气,然后一下子把空气呼出来。 
 When you breathe out, you expel air from your lungs. 呼气的时候,把肺里的空气排出。