英文關鍵字
breathing
businesswoman
coach
commute
corona
cough
crowd
crowded
defense
disease
epidemic
face
feeling
flu
headshot
ill
illness
indoor
infection
inside
mask
medical
metro
mouth
passenger
person
pollution
precaution
prevention
protect
protection
railway
respiratory
safety
seat
sick
stock
subway
train
transport
transportation
underground
unwell
urban
virus
wear
woman