She became a US citizen.

她成了美国公民。

《牛津词典》

The average Norwegian is better off than the average US citizen, but contributes about half as much to climate change.

挪威人的平均生活水平高于美国人，但对气候变化的贡献仅为美国人的一半。

youdao

So I became a US citizen in 2008, which I am really happy about.

我在2008年成为了美国公民，为此我很高兴。

youdao

because of this man here. He really wanted myself and all of us who participated in the program to get our degrees and learn what it meant to be a good citizen, and to be good parents and husbands and responsible human beings.

VOA: special.2010.06.10

If you're born in the United States you are by definition a natural born US citizen.

如果你出生在美国,那么你就是一个天生的美国人。

麻省理工公开课 - 计算机科学及编程导论课程节选

How do you know that your parents, at least one of your parents satisfies the definition? Well I've reduced the problem from am I a natural born US citizen to is one of my parents a natural born US citizen?

这是一个递归的定义，你怎么知道你的父母,至少其中一个是满足天生的美国公民,这个定义的呢？,我已经把我是一个天生的美国公民这个问题？

麻省理工公开课 - 计算机科学及编程导论课程节选

Unlike Sergio Garcia, Yen-Ling Rogers is a US citizen, a flight attendant and not famous.

FORBES: Move up http://i.forbesimg.com t Move down

He became a US citizen at 12, and opened his own recording studio in 1958.

BBC: US music producer and CD pioneer Phil Ramone dies

He said he planned to raise the case of a US citizen detained in North Korea.

BBC: Google head and former US governor in North Korea visit