25岁是个坎: 名人25岁时都在做什么

Mark Zuckerberg's Facebook was cash positive for the first time and hit 300 million users.
马克-扎克伯格的Facebook首次实现盈利，已经吸引了3亿用户

Mark Zuckerberg had been hard at work on Facebook for five years by the time he hit age 25. In that year — 2009 — the company turned cash positive for the first time and hit 300 million users. He was excited at the time, but said it was just the start, writing on Facebook that "the way we think about this is that we're just getting started on our goal of connecting everyone."
25岁时马克-扎克伯格已经在Facebook辛勤工作了五年。那一年，也就是2009年，公司首次实现了盈利，并且吸引了3亿用户。他当时非常激动，但还是说这只是一个开始。他在Facebook上写道“我们的目标是把每个人联系起来，而我们才刚刚开始。”

The next year, he was named "Person of the Year" by Time magazine.
第二年，他就被《时代》杂志评选为“年度人物”。