英文關鍵字
adult
age
alert
art
attention
background
caution
charge
cigarette
clip
cross
crossing
danger
design
fault
for
guide
health
icon
illustration
indication
information
intersections
isolated
law
limit
line
mistake
notice
over
prevent
protection
public
rectangle
red
regulations
restrict
risk
safety
sign
signage
signal
smoking
social
sue
symbol
teenage
the
tobacco
under
understand
warning