As free and open as communication has become, these are very real limitations that must be respected.

随着交流的自由公开化，这些都成了必须遵守的规定。

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The Unified Modeling Language (UML) has become a very widely adopted communication standard for software development projects around the world.

统一建模语言(uml)在全世界范围内，成为软件开发项目方面广泛采用的交流标准。

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Communication is the theme of our time, and the ability to communicate has become one of the very important factor in competition in the 21st century.

当今社会沟通已是我们这个时代的主题，沟通能力已成为21世纪人才竞争的重要因素之一。

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U.S. intelligence agencies have powerful capabilities to intercept telephone calls and e-mails, but al-Qaida has become very disciplined at avoiding electronic communication.

NPR: Risky Business: U.S. Must Rely On Foreign Spies