President Obama is back from his first trip to Asia since becoming what he called "America's first Pacific president."

VOA: special.2009.11.21

And specifically, when we talk about ionization energy, it's assumed that what we mean is actually the first ionization energy.

特别地，当我们讨论电离能的时候，我们默认,这指的是第一电离能。

麻省理工公开课 - 化学原理课程节选

And then, going back to the first question that you ask me, what's the thing that I measure the most?

回到你问的第一个问题，我看重的衡量标准是什么？

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

Let's start then with what the government's first annual report, published today, is not.

BBC: My big, fat Welsh annual report.

Say you're meeting a friend somewhere: What's the first thing you do when you get there?

ENGADGET: This is the Modem World: Why are we still texting?

When you wake up in the morning in Baghdad, what's the first thing you want to know?

NPR: Petraeus Faces 'Complex' Demands in Iraq