英文關鍵字
abstract
background
book
browsing
business
closeup
concept
dictionary
document
documents
education
flip
flipping
information
knowledge
learn
library
lifestyle
literacy
literature
novel
open
page
pages
paper
paperwork
reader
reading
research
school
searching
sheet
story
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text
textbook
thick
thinking
turn
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white
wisdom
words
work
worm
writing