英文關鍵字
atom
bath
blue
bubbles
cleaning
degreasing
demonstrationn
desk
dirt
dirty
earthquake
engine
equipment
fever
finished
flicker
futurism
gloves
greasy
help
industrial
industry
lame
machines
material
mechanic
mechanical
mechanics
metal
molecule
moving
oscillations
parts
process
protective
ready
remove
rinse
rinsing
science
small
sound
tiny
ultra
ultrasonic
ultrasound
vessel
vibration
warning
wash
washing
water
waves
when
wiggle