英文關鍵字
america
american
app
application
close
closeup
communication
conversation
courses
degree
education
educational
english
exchange
female
flag
holding
international
internet
knowledge
learn
learning
lesson
national
native
online
pc
program
screen
service
show
showing
smiling
speaker
states
student
study
tablet
technology
test
tourist
translation
united
up
us
usa
web
website
woman