The idea of Importing a specific Lesson is OK though.
The "master" Lesson is defined by your own process - if you don't edit the main version (only the copy) the main copy is by your own process the Master
Lesson
share lesson between different courses
ការពិភាក្សាត្រូវបានបិទ ដូច្នេះអ្នកមិនអាចឆ្លើយតបទៀតទេ។