该书作者认为，可重用学习对象（Reusable Learning Object，RLO）是由可重用信息对象（Reusable Information Object，RIO）组成。每个RIO由三部分组成（图1），即内容项、实践项与评估项。
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该模型采用面向对象和形式化相结合的方法，解决了现有信息融合模型缺乏可重用性、可靠性等问题。
The model is developed combing formal method with object-oriented method. It solves the problems of existing fusion models, which are short of reusability and dependability.
最后，以废旧蜗轮蜗杆零部件为对象，对废旧零部件残缺信息特征以及基于残缺信息的废旧零部件可重用再设计方法进行验证和初步应用。
Finally, the characteristics of incomplete information and the redesign method for used parts are applied in the process of remanufacturing worm-gear pair to validate the practicality and efficacy.
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