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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A topic is a unit of information that describes a single task, concept, or reference item.

主题是一种信息单位，描述了一项任务、一个概念或者一个参考条目。

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In DITA, the core information unit is a topic, which describes a single task, concept, or reference item.

DITA 的基本信息单位是 主题，它描述了单个任务、概念或者参考项。

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But, most military veterans understand the concept of small unit operations and leadership.

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Even NV Spyker, which has been sidelined after its Saab unit went bust in 2011, pulled the wraps off the B6 Venator sport concept coupe.

WSJ: Glitter Amid the Gloom at Geneva Auto Show

So while there are myriad currencies around the globe, the unit of account utilized for trade and investment, not to mention the benchmark money concept against which all other currencies are measured remains the dollar.

FORBES: Message To Greece: To Leave The Euro Isn't To Leave The Euro