青云翻译

Previous lesson can 40 minutes a lesson gradually adapted, 60 minute lesson

Lessons in previous take 40 minutes at a time, gradually adapts, 60 minutes

Whether the first several classes can a 40 minutes class, after adapt gradually, a 60 minutes class

Whether the previous lesson can be 40 minutes after one class, gradually adapt to a course, 60 minutes

Lessons in previous take 40 minutes at a time, gradually adapts, 60 minutes