Use Semantic Differential method (SD method) to analysis electric bicycle design characteristics, extract the modelling elements of electric bicycle's appereance.
应用意象尺度法（即SD法）对现有电动自行车造型特点进行了分析，提取了电动自行车的造型元素。
Semantic differential (SD) method is a most commonly used method in subjective sound quality and sound perception assessment.
语义细分法是声品质以及声感知特征研究中最广泛采用的主观评价方法。
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