英文關鍵字
man
student
laptop
talking
video
call
earphone
writing
one
person
slow
motion
home
office
computer
education
internet
desk
guy
webcam
working
online
university
communication
learning
young
adult
caucasian
headphone
closeup
study
indoor
cyberspace
teaching
elearning
business
listening
remote
conference
lesson
distant
distance
homework
headset
wireless
watching
lecture
conversation
connection
teenage
smiling
web