mission作名词时是可数的，复数形式是 missions
mission
美 /ˈmɪʃn/
英 /ˈmɪʃn/
n.
使命，任务；代表团；布道
vt.
派遣；向……传教
双语例句：
Just as the patrolmen were patrolling, they received an urgent mission.
正当巡警在巡逻时，接到了一个紧急任务。
The product manager should have a sense of mission for the company's products.
产品经理对公司的产品应抱有使命感。
