这50家企业是由一个专家小组从1000多家企业中选出来的。
The 50 companies were picked by an expert panel from a field of over a thousand.
这些项目由一个专家小组进行定级和剔除，共行3次（参与率：76%）。
These items were submitted to a panel of experts for rating and reduction, in 3 rounds (participation: 76%).
不同于由一个专家小组开始，这个项目从这个领域收集了最好的可用性知识。
Rather than starting from a small group of experts, this project gathered the best usability knowledge from the field.
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