任务assignment; mission; task; job
完成～complete one’s assignment;accomplish a task; discharge one’s duty;finish one’s job/完成上级交办的一项艰巨～ complete a tough assignment set by the superior/执行～carry out a task; perform a mission/艰巨～arduous undertaking (or task)/历史～historical mission/首要～task of primary (or cardinal) importance/～不明，责任不清ambiguous tasks and undefined responsibilities/～分配task allocation |