In the Middle Ages, troubadours and Arthurian tales recast that longing as "courtly love", a fierce, often forbidden devotion like Lancelot's for Guinevere, in which a knight proved his worth through self-sacrifice for a beloved he might never openly declare.
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。爱思助手下载最新版本对此有专业解读
多年前，我把自己在创作工作中的经验与对产品设计的态度，总结为十条原则（十诫）。我认为它们在今天依然有效：
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