英文關鍵字
abstract
antivirus
bad
barb
barbed
barrier
battle
battlefield
blood
bloody
border
closeup
concept
conflict
defense
fence
field
fight
fighting
fights
firewall
landscape
macro
metal
military
one
perimeter
protection
red
security
soldier
soldiers
trench
trenches
two
wall
war
warfare
wire
world
ww1
ww2