A differencereport can help you decide whether a given set of code changes is covered well enough by existing tests or requires that new tests be written.
差异报告通过已存在的测试，或者要求书写新的测试，来决定是否给出一系列的代码变更集合。
2
Difference reports compare two sets of coverage data and report on how the coverage Numbers have changed due to modifications in the source code or in the tests.
差异报告比较两种类型的覆盖率数据，并报告覆盖率数据是怎样由于源代码或者测试中的更改而发生变化的。
3
The scenario below illustrates the difference in outputs of running the same report in both query modes.