Authentication is a complex problem.

身份验证是个复杂的问题。

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But he added that such a complex problem could not be solved at one meeting.

但同时他也表示，如此复杂的一个问题不可能仅通过一次会议就能解决。

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Decomposition is one of the most common techniques to make a complex problem tractable.

分解是使复杂问题变得易于处理的最常见的技术之一。

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Transportation planning expert Alan Clark says traffic congestion is a complex problem whose solution calls for a comprehensive approach.

VOA: standard.2010.07.26

That's really a complex systems problem, the kind of problems that engineers are very good at dealing with.

这真是复杂的系统性问题,解决这类问题,恰恰是生物医学工程的拿手好戏

耶鲁公开课 - 生物医学工程探索课程节选

It is a complex problem and I respect their decisions and wish them the best.

BBC: SPORT | Cricket | Stuart MacGill's statement

Globalization is a done deal, and protectionism is a bad answer to a complex problem.

FORBES: The Post-Employee Economy

But he added that such a complex problem could not be solved at one meeting.

ECONOMIST: Illegal migration to Italy