adding one section
adding 2.2
2.2
# add new branch for 1103 update
"What' s new", "what's material" English pages are ready.
增加一些新文章，以及調整圖片路徑。
add chapter 2
try fix video issue
增加文章(英文文檔)
final edit of chapter 2
adopt upsteam changes
全新章節翻譯完畢！
增加文章(英文文檔) errors
增加文章(英文文檔) Bidirectionality
checkout from dev-branch
add translation for 12.2 bidirectionality
fix sean link
update original articles
adding 11.5 navigation drawer translation
adopt changes from dev-branch
adding 11.6 navigational transitions