英文關鍵字
air
background
breath
buying
clean
corona
coronavirus
coughs
danger
defense
disassemble
disease
disposable
doctor
dust
end
epidemic
equipment
face
filter
flu
health
healthcare
healthy
hospital
hygiene
illness
infection
influenza
light
man
mask
masks
medical
medicine
mouth
nurse
operation
oral
panic
people
pollution
prevention
protect
protection
puts
respiratory
risk
risky
safety
science
security
shoping
sneezes
sold
surgery
surgical
they
virus
white