英文關鍵字
audio
caucasian
classic
classical
conference
display
education
event
indoors
inside
jacet
lecture
male
man
meeting
people
person
projector
pupil
recorder
speak
speaking
speech
students
study
suit
teacher
workshop
young
英文關鍵字
audio
caucasian
classic
classical
conference
display
education
event
indoors
inside
jacet
lecture
male
man
meeting
people
person
projector
pupil
recorder
speak
speaking
speech
students
study
suit
teacher
workshop
young