cadre
/ˈkɑːdə(r)/noun
1- a small group of people specially trained for a particular purpose or profession（为某目的或职业而受特别训练的）骨干队伍, 核心：
a cadre of professional managers.
职业管理者骨干队伍。
1.1
- /亦读ˈkeɪdə(r)/a group of activists in a communist or other revolutionary organization（共产主义者或其他革命组织中的）骨干队伍。
1.2
- a member of such a group干部。
词源
mid 19th cent.: from French, from Italian quadro, from Latin quadrus 'square'.