noun 下载 🔗分享 课本，教材 A coursebook, a formal manual of instruction in a specific subject, especially one for use in schools or colleges. Examples : "Students need to buy their textbooks before the first day of class. " 学生们需要在开学第一天之前购买他们的课本教材。 education writing literature 与AI对话词汇游戏阅读练习
