英文關鍵字
acoustic
assistant
audio
boy
burning
child
children
dancing
discovery
dynamic
education
equipment
experience
experiment
fire
flame
group
kid
laboratory
listen
loud
loudspeaker
man
motion
moving
museum
music
people
physics
pressure
prores
reaction
school
science
scientific
scientist
sound
speaker
stereo
study
subwoofer
technology
teenager
tube
vibrating
visual
wave
waves