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单词
radon
释义
radon
ra
don
/
ˈreɪdɑn
/
noun
[uncountable]
(
symbol
Rn
)
Etymology
ETYMOLOGY
radon
Origin:
1900-2000
radium
science
,
chemistry
a
radioactive
gas that is an
element
and that can be dangerous in large amounts
随便看
columnist
com
com-
coma
Comanche
Comaneci, Nadia
comatose
comb
combat
combatant
combat fatigue
combative
combatively
combativeness
combination
combination lock
combination plate
combination reaction
combine
combined
combo
combust
combustibility
combustible
combustion
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更新时间:2025/12/17 22:24:32