英文關鍵字
area
ball
beach
blue
buoy
buoyancy
danger
dock
equipment
float
guard
harbor
help
lake
lifeguard
marine
marker
navigation
navy
ocean
rope
safety
sailing
sea
seacoast
seascape
ship
signal
string
summer
water
wave
wet
yellow
英文關鍵字
area
ball
beach
blue
buoy
buoyancy
danger
dock
equipment
float
guard
harbor
help
lake
lifeguard
marine
marker
navigation
navy
ocean
rope
safety
sailing
sea
seacoast
seascape
ship
signal
string
summer
water
wave
wet
yellow