lake
加入词篮pond
pool
stream
river
deposit
pile
fill
zone
altitude
rock
tough
marble
mineral
fossil
coal
iceberg
volcano
earthquake
map
chart
spring
well
spring
astronomy
astronomer
universe
universal
planet
Jupiter
earth
Mars
star
galaxy
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rocket
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moonlight
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spacecraft
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Cancer
orbit
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chemist
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aluminium
tin
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gas
air
sky
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mix
mixture
physics
physicist
science
scientist
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atom
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matter
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split
movement
mobile
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turn
steady
vapour
steam
solid
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rate
spring
shrink
light
ray
X-ray
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period
