因为我以前报了一个日语教育课程，所以今天我收到了一封从gacco发来的电子邮件。 gacco 是日本的MOOC(Massive Open Online Courses)。 这封电子邮件里提到的一门课程很有意思，那就是白川文字学课程。 白川老师的汉字学很有名。 我很开心我已经报名并学习这门课程。 As I took a Japanese education course in the past, I have received an email from gacco today. Gacco is a Japanese MOOC. There is an interesting course in the email, which is Shirakawa Characters Study course. Professor Shirakawa is very famous for his Chinese characters study. I have enrolled in this course and am happy to study it.