英文關鍵字
1080
button
camera
caucasian
class
classroom
college
communication
computer
desk
education
electronic
ethnicity
figure
finger
fingers
four
hand
happy
internet
key
keyboard
learn
learning
men
message
mid
mixed
monitor
network
one
people
person
race
room
screen
sitting
smiling
student
study
studying
teacher
technology
the
typing
university
use
using
with
women
write
years