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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
overcompensation
overconfident
overcook
overcooked
overcrowded
overcrowding
overdeveloped
overdo
overdone
overdose
overdraft
overdrawn
overdress
overdressed
overdrive
overdue
over-easy
overeat
overemphasis
overemphasize
overestimate
overexcited
overexpose
overexposure
overextend
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更新时间:2025/11/18 15:06:06