英文關鍵字
and
attention
beacon
berlin
blue
boating
border
buoy
caution
coast
coastal
coastline
danger
europe
float
floatation
floating
germany
guard
guide
help
indicator
marine
mark
marker
nautical
navigation
navigational
object
ocean
protection
range
red
rescue
river
safe
safety
sailing
save
sea
seascape
secure
security
sign
signal
spree
steel
symbol
water
watern
wave
white
yellow