英文關鍵字
adult
aged
app
business
call
class
conference
course
distancing
distant
elderly
employee
english
event
explain
female
foreign
from
happy
headphones
headset
home
job
language
lecture
lesson
mature
middle
office
old
older
online
pensioner
people
remote
retired
senior
smiling
social
speak
stay
talk
teach
teacher
tutor
video
virtual
woman
work
worker