scientist
加入词篮experiment
electron
atom
energy
horsepower
matter
substance
heat
calorie
nucleus
split
movement
mobile
motion
rotary
whirl
roll
spin
turn
coil
stability
static
steady
vapour
steam
solid
solidarity
liquid
fluid
impetus
gravity
velocity
rate
spring
stretch
zigzag
shrink
magnet
light
ray
X-ray
ultraviolet
infrared
reflection
laser
spectrum
focus
interference
echo
wave
frequency
period
radar
potential
voltage
resistance
fuse
volt
watt
conductor
semiconductor
pressure
stress
friction
strain
mass
inertia
stay
ecology
variety
species
energy
power
sheer
environment
conservation
pollution
resource
erosion
greenhouse
ozone
lead
mercury
stack
smog
exhaust
waste
tribe
evolution
primitive
civilization
civilization
culture
respect
savage
spear
bow
arrow
stick
