英文關鍵字
add
adult
black
body
caucasian
closeup
count
countdown
counting
fingers
finish
five
forefinger
four
gesture
hand
human
ideas
index
man
math
mathematics
men
number
one
part
pointing
school
sign
start
symbol
three
thumps
two
victory
white
英文關鍵字
add
adult
black
body
caucasian
closeup
count
countdown
counting
fingers
finish
five
forefinger
four
gesture
hand
human
ideas
index
man
math
mathematics
men
number
one
part
pointing
school
sign
start
symbol
three
thumps
two
victory
white