英文關鍵字
background
barb
barbed
barbwire
barrier
blue
border
boundary
chain
close
criminal
danger
escape
fence
footage
forbidden
freedom
immigrant
immigration
injustice
iron
jail
liberty
limit
line
locked
macro
man
metal
military
prison
prisoner
protection
rebellion
rights
safety
security
silhouette
sky
steel
sun
trespass
violence
war
wire
wired