英文關鍵字
address
adult
background
box
caucasian
check
close
closeup
communication
container
correspondence
delivery
envelope
female
girl
hand
holding
home
house
indoors
inside
letter
letterbox
letterboxes
letters
mailbox
mailboxes
message
metal
open
outdoors
people
person
post
postage
postal
postbox
postboxes
private
receive
send
service
silhouette
storage
wall
woman
young