Rather than be absorbed into Facebook's business, Mr. Koum sees WhatsApp functioning as a separate arm that will help the social network diversify its revenue streams as it grows.

Mr. Koum: It was all his idea.

：这完全是他的主意。

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Still, Acton and Koum's late-blooming strategy worked.

不过，阿克顿和库姆大器晚成的战略行之有效。

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Before that, he spent three years at Apple AAPL 0.39% and over 11 years at Yahoo, where he met WhatsApp CEO and cofounder Jan Koum and eventually became the company's vice president of engineering.

在此之前，他在苹果（Apple）干了三年，在雅虎干了11年多。阿克顿在雅虎结识了WhatsApp首席执行官兼联合创始人简o库姆，并最终成为WhatsApp公司负责工程设计的副总裁。

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Mr. Koum told The Wall Street Journal last December that WhatsApp has 'no plans to sell, IPO, exit,' or get new funding.

Koum去年12月份向《华尔街日报》（The Wall Street Journal）表示，WhatsApp没有出售、上市、退出或筹资的计划。

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Jan Koum, WhatsApp chief executive and the guy who just agreed to sell his company to Mr. Zuckerberg for$ 19 billion, is also addressing the congress, along with a stable of chiefs of the world's biggest telecom companies.

WhatsApp首席执行长库姆（Jan Koum）也与世界最大科技公司的一众老板们一道出席大会；库姆刚刚以190亿美元向扎克伯格出售了WhatsApp。

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WhatsApp will continue to operate independently and retain its brand, while co-founder and CEO Jan Koum will join Facebook's board, bringing the total number of members to nine.

WhatsApp将继续独立运营，并保留自己的品牌，WhatsApp的联合创始人兼首席执行长Jan Koum将加入Facebook董事会，这使得Facebook董事会的成员增加到九人。

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Privacy was particularly important to Mr. Koum, who grew up in a communist country with a secret police.

Koum是在一个有秘密警察的共产主义国家长大的，隐私对他来说尤为重要。

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Mr. Koum: It was very difficult for him to find a good way that would make us be interested in a conversation.

：对马克来说，要找到一个令我们感兴趣的对话切入点非常难。

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Talks with Zuckerberg about a potential WhatsApp acquisition began heating up in early February, when Zuck-as he is known to tech insiders-presented Acton and Koum with a hard number.

早在今年二月初，同扎克伯格关于可能收购WhatsApp的谈判就开始升温。扎克伯格向阿克顿和库姆开出了一个确切的数字——高科技界人士都知道，这是他的一贯做法。

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These differences have been a continual topic of discussion for the two men as they developed a friendship over the past two years and ultimately negotiated the deal that would make Mr. Koum a multi-billionaire and bring his 55-person startup inside the social network.

上述差异一直是这两人间不断讨论的话题。他们在过去两年间结成友谊，并最终谈判达成前述交易。这宗交易足以令库姆成为一名亿万富豪，并将这家共有55名员工的初创企业并入Facebook这张社交网络。

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Mr. Zuckerberg said he and Mr. Koum first discussed the deal on a Sunday evening less than two weeks ago.

扎克伯格表示，他与Koum首次讨论这笔交易是在不到两周前的一个周日的晚上。

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Below are edited excerpts of the interview with Mr. Koum:

以下是经过编辑的访谈内容：

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Jan Koum, WhatsApp's co-founder and chief executive, has resisted advertising and built a mobile service that makes money from 99-cent subscriptions.

WhatsApp的联合创始人兼首席执行长（CEO）库姆（Jan Koum）一直拒绝在应用程序内引入广告，其主要收入就是用户支付的每年99美分的使用费。

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Jan Koum co-founded WhatsApp along with Brian Acton, a former colleague at Yahoo, and is the mobile-messaging company's chief executive.

简•库姆和他当年在雅虎（Yahoo）的同事布莱恩•埃克顿（Brian Acton）共同创建了WhatsApp，并担任这家移动消息应用公司的首席执行长。

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Mr. Koum will join Facebook's board of directors.

Koum将加入Facebook董事会。

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In a December update, Koum said his company's focus was on messaging and only messaging& no games, no advertising, no gimmicks.

在去年12月公布最新数据时，库姆说，他的公司关注的是消息，也只有消息，不是游戏，不是广告，不是华而不实的东西。

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In a Tumblr post on the deal Wednesday, WhatsApp investor Sequoia Capital talked about how Koum's experience emigrating to the U.S. as a 16-year-old, and desire to keep in touch with family back in Russia and Ukraine, helped shape his focus on conversations.

WhatsApp的投资者红杉资本周三在Tumblr上发文宣布上述交易时，提及了库姆以前的一段经历，说他16岁移民到美国时，非常渴望与远在俄罗斯和乌克兰的家人保持联络，这使他非常重视对话和交流。

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Mr. Koum: We have a shared mission of connecting the world and making it more open.

：我们都担负着连接世界、提高世界开放程度的共同使命。

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Last May, Koum spent 30 minutes onstage at the D: Dive Into Mobile conference in New York.

去年5月，库姆在纽约D：Dive Into Mobile大会上发表了30分钟的演讲。

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The company, founded in 2009 by Ukrainian Jan Koum and American Brian Acton, reached 450 million users faster than any company in history, wrote Jim Goetz, a partner at investor Sequoia Capital.

红杉资本（Sequoia Capital）的合伙人戈茨（Jim Goetz）写道，WhatsApp用户数量达到4.5亿的速度要快于历史上的任何公司。该公司是由乌克兰人Jan Koum和美国人阿克顿（Brian Acton）在2009年创立的。

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