英文關鍵字
20s
30s
40s
african
american
audience
black
business
businessman
businessmen
businesswoman
businesswomen
caucasian
conference
delegates
down
female
forties
giving
group
hispanic
listening
lock
male
man
medium
men
multiracial
occupation
office
people
person
podium
pointing
presentation
screen
seven
shot
speaker
speaking
suit
talking
team
teamwork
thirties
twenties
woman
women
worker