日期：
来源：雅诚德英语网
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 News，“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。