plain
加入词篮basin
lake
pond
pool
stream
marsh
river
deposit
layer
pile
heap
fill
horizon
altitude
rock
tough
stiff
mineral
ore
fossil
coal
iceberg
volcano
earthquake
map
ratio
chart
spring
well
spring
astronomer
universe
universal
planet
earth
star
satellite
rocket
moon
phase
sun
space
spacecraft
spaceship
Cancer
orbit
revolution
chemistry
chemist
acid
molecule
agent
metal
aluminium
copper
tin
nickel
crystal
particle
concentration
nitrogen
reaction
gas
air
sky
solution
oxygen
silicon
hydrogen
mix
mixture
blend
physics
physicist
science
scientist
experiment
electron
atom
energy
horsepower
matter
substance
heat
radiation
nucleus
split
movement
mobile
motion
roll
spin
turn
coil
roller
stability
static
steady
vapour
