网课是一种新兴的学习方式，是为学习者提供的以互联网为平台、内容包含视频、图片、文字互动等多种形式的系列学习教程。
    Online course is a new way of learning. Based on the platform of Internet, Online course is a series of courses with videos,pictures ,words interaction and other forms of study.
    疫情期间，网课一度成为主要教学方式。
    During the epidemic(covid 19), online classes once became the main teaching method.
    大中小学纷 纷将课堂搬到网上，开启网上课堂模式。
    Schools and colleges opened their classes online.
    区别于线下课堂教授，网课具有方式多样，灵活便 捷等优点，越来越多的学生群体和父母的开始使用。
    Different from the offline class teaching, online class has various advantages. Because online is flexible and has many ways of studying, more and more students and parents began to use it.
    网课一度成为师生交流主要途径，上网 课成为疫情期间的教学新常态。
    Online courses once became the main way for teachers and students to communicate, having courses online is the new common teaching method during the epidemic.