英文關鍵字
man
student
laptop
talking
video
call
greeting
cheerful
happy
earphone
one
person
slow
motion
home
computer
education
internet
desk
online
communication
learning
young
adult
university
book
headphone
closeup
study
cyberspace
teaching
elearning
business
remote
lesson
homework
headset
watching
conversation
caucasian
connection
technology
smiling
web
meeting
sitting
discussion
male
webcam
guy
gesture
welcoming
class