英文關鍵字
action
anxious
ballard
biology
cement
confined
cycle
environment
fins
fish
flap
flow
focus
force
gills
glass
gray
intensity
ladder
life
locks
migration
motion
of
opaque
outdoors
salmon
school
seasonal
selective
silvery
sockeye
spawn
state
sunlight
swimming
thrust
transparent
washington
water
wildlife
window