Apple's stated purpose of its revised iPhone developer policy is to block out meta platforms to ensure a high level of quality in the App Store.
苹果声称修订iPhone开发者政策的目的是为了防止出现其他平台软件的翻版，以此来保证软件商店软件的高质量。
The value of educational policy subject is realized in three forms of meta-value, implicit value and explicit value.
教育政策主体价值依次表现为元价值、隐价值和显价值三重形态。
The value of educational policy subject is realized in three forms of meta-value, implicit value and explicit value.
教育政策主体价值依次表现为元价值、隐价值和显价值三重形态。
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