英文關鍵字
concept
coronavirus
covid19
dirty
disposable
ecological
ecology
ecosystem
environment
environmental
epidemic
garbage
gloves
green
infection
mask
medical
nature
outdoor
pandemic
park
people
person
plastic
pollution
prevent
problem
protection
protective
public
quarantine
recycle
recycling
reuse
rubbish
shoes
social
summer
throw
throwing
trash
unrecognizable
virus
waste