英文關鍵字
adult
arm
background
business
caucasian
communicate
communication
concept
count
countdown
face
fifth
finger
first
fist
five
four
fourth
gesture
gesturing
guy
hand
idea
index
isolated
male
man
number
palm
people
person
second
shape
showing
sign
single
start
success
symbol
third
thumb
victory
white
wrist
young