传达上级命令、任命、许可、邀请的函件。的英文

• letter missive

• 传达:    pass on; transmit; relay; co ...
• 上级:    higher level; higher-ups; hi ...
• 命令:    order; command; directive; i ...
• 任命:    commission; designate; appoi ...
• 许可:    permit; allow; permission; a ...