英文關鍵字
allow
armor
army
artful
astute
background
black
boat
bridge
class
defense
depth
devonshire
dock
escort
exit
fight
floating
for
gun
hunter
immersion
killer
lifting
marine
metal
military
naval
navy
new
nuclear
ocean
position
power
sailing
sea
service
ship
steel
submarine
technology
the
transport
trials
vessel
vessels
waiting
war
warship
water
weapon
with