cadre        
noun uk/ˈkɑː.dər/ /ˈkɑː.drə/ us/ˈkɑːd.reɪ/
 [ C, + sing/pl verb ](军队、政治或商业组织的)骨干队伍,干部队伍 
a small group of trained people who form the basic unit of a military, political, or business organization
  [ C ]干部 
a member of such a group