notebook  
noun [ C ] uk/ˈnəʊt.bʊk/ us/ˈnoʊt.bʊk/
  (PAPER)      
 A2 笔记本
a book of plain paper or paper with lines, for writing on
  She was jotting things down in a little notebook. 她在一个小笔记本上匆匆记了些东西。 
 - More examples
 - I carry a notebook so that I can jot down any ideas.
 - I like to keep a notebook and pencil within reach.
 - Sophie's notebook is covered with stickers.
 
  (COMPUTER)      
 (also notebook computer)笔记本电脑,手提电脑 
a very small computer that you can carry easily
 Compare: laptoppalmtop