Why is marking a book necessary? Because it keeps you awake.
为什么在书上做标记是必要的？因为它会让你保持清醒。
These are all kinds of devices for marking a book intelligently and fruitfully.
在书上作记号，有各种各样好的、行之有效的方法。
Genetic marking is the equivalent of giving every book a title, table of contents and index-and with much greater speed and accuracy than any librarian could manage.
基因标记相当于给每本书起名，建立内容目录和索引，而且其速度和准确度是任何图书管理员都无法做到的。
I contend, quite bluntly, that marking up a book is not an act of mutilation but of love.
坦率地说，我认为，在书上涂抹标记不是一种损毁行为，而是爱。
Film of the book, marking a woman loves a man there is definitely some reason, and a woman can love a man to the degree of self crazy.
本片中的书，标志着一个女人爱一个男人肯定是有某种原因的，并且一个女人可以爱一个男人到自我疯狂的程度。
Whenever necessary, I would do some marking in the book, using colour pens and even taking down notes in a separate exercise book for future reference.
必要时，更在书本上做记号，用彩色笔加上五颜六色，甚至在本子上另做笔记，以备日后参考。
Whenever necessary, I would do some marking in the book, using colour pens and even taking down notes in a separate exercise book for future reference.
必要时，更在书本上做记号，用彩色笔加上五颜六色，甚至在本子上另做笔记，以备日后参考。
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