The design has to appeal to all ages and social groups.
设计得要雅俗共赏，老幼皆宜。
Specific methods include: Market research, User research, Managing and planning and Design research groups.
这个阶段常用的具体方法包括：市场研究，用户研究，管理与规划和设计研究小组。
It's really hard to design products by focus groups.
借由焦点团体来设计产品是非常困难的。
It's really hard to design products by focus groups.
根据一个群体来设计出产品是一件很困难的事情。
It's really hard to design products by focus groups.
根据一个群体来设计出产品是一件很困难的事情。
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