First thing is first.

重要的事先办。

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The first thing a passenger sees on the Cape May coast is the area's famous lighthouse.

VOA: special.2009.06.01

And the first thing you do is ask is it an instance of some problem that other people have already solved?

而且你以前从没碰过这个问题,你首先要做的一件事就是问问自己,这是不是一个别人已经解决了的问题？

麻省理工公开课 - 计算机科学及编程导论课程节选

Your first thing is responsibility to fulfill your rights to your people, to your culture, to your family, to your government.

你的首要任务是履行义务而不是行使权利,对人民，对文化圈，对家庭，对政府都是如此。

普林斯顿公开课 - 人性课程节选

Your parents, your grandparents, oftentimes they were in a position where when they got that first job, the first thing they're thinking about is, how do I save to buy a home and start a family.

WHITEHOUSE: President Obama Speaks on Student Loan Interest Rates

MS. PSAKI: Well, one, I think the first thing you said is -- both are important, but let me touch on that first.

WHITEHOUSE: Press Gaggle aboard the Press Bus en route Davenport, IA

"We've got a good autumn series coming up but the first thing is Argentina, " stated Johnson.

BBC: Johnson sees England improvement