second-in-command (alsosecondincommand)

• 1.  

  N-SING（单数型名词） A second-in-command is someone who is next in rank to the leader of a group, and who has authority to give orders when the leader is not there. 副指挥

  例：

  He was posted to Hong Kong as second-in-command of C Squadron.

  他被派到香港任C中队的副队长。