AT K公司将设计、建造并安装这个虚拟的空间环境，该环境被称为空间威胁评估测试平台系统。

ATK will design, build and install the virtual space environment called the space Threat Assessment Testbed System, company officials said.

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我们排除病例对照研究，因为其病例与对照比系决定于其研究设计，会造成其资料不适合用于评估测试的准确性。

We excluded case-control studies, as the ratio of cases to controls is determined by the study design, making the data unsuitable for assessing test accuracy.

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同时做了系统的高保真原型并进行了可用性评估测试，对新设计的推荐系统进行了验证。

The paper has done a lot of usability testing, get many of the recommendations and methods form users for designing the new system.

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