He has a mission.

他有一个使命。

youdao

If then I bend over and pick up a stick, he is instantly before me. The great thing has now happened. He has a mission.

如果那时我弯腰拾起一根树棍，他会立刻跑到我面前。

youdao

He has been on a mission, he says, to have Congress put the issue on the national agenda; he'd also like to see the White House establish a commission on aging.

他担负起了这样一个任务，他说，他要说服国会把这个议题放上国家的议程上来；他也希望白宫能够建立一个关于老年人的委员会。

youdao

To promote that mission Swan has just published an autobiography in which he writes passionately about the importance of a clean energy agenda.

VOA: standard.2009.12.10

The other theory is that he genuinely believes that he has a mission.

NPR: Iranian President Calls Holocaust a Myth

Even so, the delay is a setback for Mr. Obama, who is on a 10-day, four-nation swing through Asia that he has promoted as a mission to boost the American economy and create jobs.

FORBES: Asia Trip Hasn't Been So Great For Obama

When a soldier or a police officer deploys to a UN mission she or he has a sacred duty.

UN: Secretary-General