mission/ˈmɪʃ(ə)n/
n.1. 特使团a trade mission to Japan赴日贸易代表团
2. 使命；任务He was sent to Washington on a diplomatic mission.他被派往华盛顿，负有外交使命。
3. 计划或执行任务的办公室4. 传道区5. 天职It seems to be his mission to help others.他的天职好像就是帮助别人。
She believed that her mission in life was helping the old and the sick.她认为她一生的天职就是帮助老人和病人。