英文關鍵字
abstract
adult
antique
background
bible
book
bookstore
concepts
cover
data
diary
dirty
discovery
education
encyclopedia
expertise
hand
hardcover
history
ideas
information
intelligence
learning
library
literacy
literature
macro
novel
objects
old
oldfashioned
open
page
paper
publication
reading
religious
research
school
single
stack
study
studying
textbook
unfolded
university
wisdom
words