英文關鍵字
are
atom
bath
blue
bubbles
cleaning
degreasing
dirt
dirty
earthquake
engine
equipment
fever
flicker
futurism
gloves
greasy
help
industrial
industry
lame
machine
material
mechanic
mechanical
mechanics
metal
molecule
moving
oscillations
parts
process
protective
ready
rinse
rinsing
science
sound
tiny
ultra
ultrasonic
usen
vessel
vibration
warning
washing
water
waves
which
wiggle