英文關鍵字
atom
blue
bubbles
caused
cleaning
degreasing
dirt
earthquake
engine
equipment
fever
flicker
futurism
gloves
industrial
industry
lame
material
mechanic
mechanical
mechanics
molecule
moving
oscillations
parts
process
protective
rinse
science
small
sound
tiny
ultra
ultrasound
vessel
vibration
vibrations
washing
water
waves
wiggle