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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
Cramer's rule
crammed
cramp
cramped
cramping
crampon
cranberry
crane
Crane, Hart
Crane, Stephen
cranial
cranium
crank
crank call
crankcase
crankiness
crankshaft
cranky
Cranmer, Thomas
crannied
cranny
crash
crash course
crash diet
crash helmet
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更新时间:2025/7/31 21:39:22