Educational.Typical learning time: Approximate or typical time it takes to work with or through this learning object for the typical intended target audience.
Typical Learning Time：一般预期目标受众使用或完成该学习对象所花费的大约时间或通常时间。
Educational.Typical learning time: Approximate or typical time it takes to work with or through this learning object for the typical intended target audience.
Typical Learning Time：一般预期目标受众使用或完成该学习对象所花费的大约时间或通常时间。
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