The international civil aviation organization doesn"t mandate that Mandarin be the official international language of aviation. They do however, mandate that English is the official language."

国际民航组织没有规定普通话是官方认可的飞行语言。 但他们确实规定英语是正式用语了！

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So we have t the necessity to carry on a valid distinction for the speech be influenced by local accent, in order to raise the function of mandarin study and train system.

因此我们有必要对受地方口音影响的语音进行有效区分，以便提高普通话学习和训练系统的性能。

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You don "t have to speak a word of Mandarin to understand that."

你不需要懂普通话就可以理解这点。

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0% of the websites that may change, two years now, into mostly mandarin or some other language. We don't know.

也许，两年后80%的网站，会变成其他语言,可能是普通话，或者其他语言，我们无法预测。

麻省理工公开课 - 媒体、教育、市场课程节选

Mr. Rogers, who started Quantum Fund with financier George Soros, doesn't know Mandarin and had never lived in Asia.

WSJ: To Improve Kids' Chinese, Some Parents Move to Asia

Her mother, who doesn't speak Mandarin, stared at Happy uncomprehendingly.

WSJ: To Improve Kids' Chinese, Some Parents Move to Asia

They advanced much more quickly than if they had tried to climb the career ladder in the U.S. One young woman who works in financial services is already doing deals with senior Chinese executives even though she doesn't speak Mandarin.

FORBES: Careers