英文關鍵字
dust
pollution
protective
mask
wear
family
father
mother
son
walking
street
wearing
facial
protection
accessory
dangerous
smoke
character
people
man
smog
infection
allergy
male
woman
female
kid
child
air
toxic
environmental
nature
danger
dirty
environment
protect
unhygienic
breath
breathing
ecology
emission
hazard
harmful
industry
problem
unhealthy
motion
graphic
animation
hd