Two problems existing in current project management unit problem.

二是目前水利工程管理单位普遍存在的问题。

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One of the most popular approaches to this problem in software-development circles involves the concept of unit testing.

对于软件开发周期中的测试问题，最流行的解决方式之一涉及单元测试的概念。

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One place where this can be a problem is with unit testing, where we write code that tests the code that runs an application.

其中一个产生问题的位置就是单元测试，我们编写代码来测试运行应用程序的代码。

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Unlike some types of security updates and service packs issued by Microsoft that can be applied to an entire network, many companies must correct this problem unit by unit.

CNN: Sasser worm rips through Internet

Bob Richard, executive vice president for gas operations of the company's DTE Gas unit, said the problem is being rectified now.

WSJ: Report: Michigan a leader in outdated gas lines

He wants to see an immediate reduction in pesticide use until the effects are better understood, and is pressing for the formation of a European Union environment unit to study the problem.

BBC: By BBC News Online's Environment Correspondent Alex Kirby