Explanation: Behind closed doors at home reading. Concentrate on studying hard to describe buried Usage: -Linked; for the predicate; concentrate hard at studying hard to describe Source: Northern Qi tui "Family Instructions Mian School": "cover from the next phase should also learn from. See behind closed doors reading, teacher heart naturally. Crowded, bustling Canton to sit more than those who carry false bad loss."
No. 2
Study at home behind closed doors. Intended to study alone, and not with others demonstrate their. Also used to describe the focus after knuckled down to study.