英文關鍵字
corona
disease
face
protect
train
woman
coronavirus
covid19
epidemic
flu
infection
mask
metro
pandemic
person
prevention
protection
subway
transportation
bus
cellphone
connected
girl
health
illness
lifestyle
medicine
mobile
phone
pollution
smartphone
medical
passenger
virus
communication
contamination
epp
europe
hand
influenza
liquid
pneumonia
riding
breathing
cough
female
ill
sick