To stop the "black case work", the unit joining into the construction signed the Lifelong Quality and Safety Contract with the water-providing engineering headquarters.

为了杜绝暗箱操作，参建单位目前与供水工程总指挥部签定了质量、安全终身责任书。

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To stop the "black case work", the unit joining into the construction signed the Lifelong Quality and Safety Contract with the water-providing engineering headquarters.

为了杜绝暗箱操作，参建单位目前与供水工程总指挥部签定了质量、全终身责任书。

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The more black box, work-stream driven the test organization is, the more effectively primary use case documents can be applied to sizing.

如果测试组织被越多黑盒、工作流所驱动，主要的用例文档就越能有效地在估计中运用。

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"Previous work has identified potential examples of black holes on their way to merging, but the case presented by Boroson and Lauer is special because the pairing is tighter and the evidence much stronger, " said Jon Miller, an astronomer at the University of Michigan.

BBC: Dancing black hole twins spotted