每门课程都进一步分为多个单元，每个单元都有学习资料（PDF文档），并且提供了自我评价的方法。

Each course is further divided in modules, each module coming with study material (a PDF document), and offers the option for self-assessment.

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通过生成代码覆盖率的具体数值，Cobertura将单元测试从一种艺术转变为一门科学。

By producing hard Numbers for code coverage, Cobertura transforms unit testing from an art to a science.

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只有一个输入的数字电路单元是缓冲器或反相器，而输入在一个以上的则称为逻辑门。

Only one input of the digital circuit unit is the buffer or inverter, the input in more than one are called logic gates.

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