你如何评价在线渠道在当今环境中的实用性和功效？
How do you assess the utility and efficacy of this channel in today's environment?
然而实用性专家雅各布·尼克森的评价却与威尔逊对iPad的用途的赞扬大相径庭。
Wilson's appreciation of the iPad's usability contradicts with usability expert Jakob Nielsen's assessment.
结果表明，该评价模型具有良好的实用性。
The results illustrate that the comprehensive evaluation model has good practicality.
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