英文關鍵字
advertisement
agency
audio
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blue
bubble
cheerful
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closeup
college
communication
country
course
courses
culture
education
exchange
female
foreign
happy
international
knowledge
language
learn
learning
lesson
national
portuguese
program
school
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smile
smiling
speak
speech
student
study
studying
talk
teaching
test
thinking
tourism
translate
translation
travel
up
woman
young