英文關鍵字
1080p
academic
adult
attentively
books
campus
college
computer
concentrated
concentrating
definition
digital
documents
education
female
files
focused
hd
high
highdef
higher
knowledge
mixedrace
notebooks
one
papers
pc
person
pile
school
scrolling
serious
sheets
student
table
tablet
thoughtful
touching
touchscreen
university
using
woman
working
writing
young