英文關鍵字
adult
audience
auditorium
back
boardroom
business
businessman
caucasian
chair
conference
congress
convention
corporate
direction
discussion
empty
executive
finger
forefinger
furniture
gestures
hall
hand
index
indoor
interlocutor
isolated
left
male
man
meeting
nobody
people
performance
point
pointer
pointing
presentation
professional
rehearsing
scene
screen
seat
seminar
showing
space
speaker
view