英文關鍵字
assistance
beach
boat
canal
coast
coastline
concepts
danger
dangerous
death
discontent
diving
drown
drowning
failure
fear
german
germany
gesture
help
human
kiel
life
liquid
loose
ocean
people
person
problem
reflection
rescue
river
sea
ship
sign
sink
sky
sos
submerge
surface
swimming
symbol
underwater
urgency
warning
water
wave
wet