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单词
nivenite
释义
nivenite
[`niv·ǝ´nīt]
MINERALOGY
UO
2
A velvet-black member of the uranite group; contains rare-earth metals cerium and yttrium; a source of uranium.
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air-traffic controller
air-traffic control radar beacon system
air-traffic control zone
air transport
air transportation
air trap
air-tube breathing apparatus
air-tube clutch
air turbulence
air valve
air vane
air-variable capacitor
air vehicle
air-velocity measurement
air vessel
air void
air volcano
air wall
air washer
air-water jet
air-water storage tank
air-water vapor mixture
airwave
airway
airway beacon
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