A Pearson spokesperson told BuzzFeed News that "digital materials are less expensive and a good investment" that offer new features, like audio texts, personalized knowledge checks and expert videos.
培生集团的一名发言人告诉BuzzFeed新闻，“数字材料更便宜，是一项不错的投资”，它提供了音频文本、个性化知识检查和专家视频等新功能。
This also makes it convenient for the data service provider to offer new features in newer service versions and not force all consumers upgrade simultaneously.
这也可以让数据服务提供者方便地在服务新版本中提供新特性，不用强迫所有消费者同时升级。
This also makes it convenient for the data service provider to offer new features in newer service versions and not force all consumers upgrade simultaneously.
这也可以让数据服务提供者方便地在服务新版本中提供新特性，不用强迫所有消费者同时升级。
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