cadre

cadre
/ˈkɑ:də(r); ?@ ˈkædrɪ; `kædrɪ/ n
1 small permanentgroup of trained workers, soldiers, etc that can be enlarged when necessary 核心小组（受过训练的工作人员、 军人等, 必要时可以扩充）.
2 a member of such a group 干部.

牛津英汉双解词典