句子采用并列结构'When...; when...'，对称工整地表达了在不同场景下应有的专注状态，逻辑清晰且易于记忆。
Reading is beneficial, but it depends on the intention of the mind. — Qing Dynasty · Li Rui, "Military Mirror"
A good book is a faithful friend; it is never forgotten in a lifetime. — British Proverb
The fragrance of books remains in the chest. — Song Dynasty · Xin Qiji
Treat books like making new friends. — German · Goethe
Study diligently, grasp the core, prefer depth over breadth, and focus over quantity. — Zhou Enlai, "Selected Works of Zhou Enlai"
Books are inseparable life companions and mentors for young people. — Russian · Gorky
Books are as rich as the sea, containing all goods. A person's energy cannot absorb everything, but only seek what is desired. Therefore, scholars should focus on one intention in each pursuit. — Su Shi, "Essays and Briefs of Dongpo"
The light of a good book exceeds that of the stars. — Russian Proverb
Read ten thousand books, travel ten thousand miles. — Qian Yong, "Lvyuan Conghua · Reading Ten Thousand Books"
There is no entertainment cheaper than reading, nor any more lasting satisfaction. — Montaigne
When reading, the mind is on the book; when working, the mind is on the task. — Song Dynasty · Zhu Xi, "Collected Categories of Zhu Xi's Words"
Books are calm and reliable friends. — French · Hugo
The more one reads, the stronger and braver the spirit becomes. — Russian · Gorky
A family without books is like a house without windows. — English · Johnson
The taste of external things may become boring with time; the taste of reading grows deeper with age. — Song Dynasty · Cheng Yi
Approach gradually, read thoroughly, and think deeply. — Song Dynasty · Zhu Xi, "Wife of Reading"
开卷有益，在乎用心。——清·李蕊《兵镜》
好书如挚友，终身不相忘。——英国谚语
胸中书传有余香。——宋·辛弃疾
对于书籍就跟交新朋友一样。——德·歌德
加紧学习，抓住中心，宁精勿杂，宁专勿多·——周恩来《周恩来选集》
书籍是青年人不可分离的生命伴侣和导师。——苏·高尔基
书富如入海，百货皆有·人之精力，不能兼收尽取，但得春所欲求者尔·故愿学者每次作一意求之·——苏轼《东坡文集事略》
好书的光亮超过星星。——俄罗斯谚语
读万卷书，行万里路。——钱泳《履园丛话·读万卷书》
没有再比读书更廉价的娱乐，更持久的满足了。——蒙台居
读书心在书，为事心在事。——宋·朱熹《朱子语类辑略》
书籍是一种冷静可靠的朋友。——法·雨果
读书愈多，精神就愈健壮而勇敢。——苏·高尔基
一个家庭中没有书籍，等于一间房子里没有窗户。——英·约翰逊
外韧之味，久则可厌；读书之味，愈久愈深。——宋·程颐
循序而渐近，熟读而精思。——宋代·朱熹《读书之妻》