Some publishers warn that Apple's terms can be restrictive in other ways, and that a model that looks good in theory may not be as attractive in practice.
一些出版商性高说苹果的策略会存在局限性，一个理论上看起来不错的模式现实中未必那么有吸引力。
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Based on cases appeared from the practice, the article is the research on restrictive behavior and regulations in licensing of intellectual property.