* add feature part 01
* update sentences
* update sentences
* update sentences
* update file based on comment
* leave ctrl, shift, alt key name as alphabet
* update file based on comment
* update file based on comment
* update file based on comment
* update file based on comment
* remove unnecessary space on define line
* update sentence based on pull request's comment
* translate 'breathing' in document
* change expression in table
* update file based on comment
* change the word 'brightness', and update based on comment
* update based on comment
* update based on comment
* add language directory name to each internal link
* update based on comment
* update based on comment
