英文關鍵字
african
afroamerican
answering
attending
background
beard
black
building
business
businessman
call
camera
communicating
communication
dark
dawn
designer
discussing
discussion
evening
hairs
man
morning
motion
movement
moving
negotiating
negotiation
office
outdoor
outside
phone
red
serious
silhouette
slidecam
smartphone
sun
talented
talk
talkative
talking
using
walk
walking
work
workplace
young