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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
friskily
friskiness
frisky
frisson
fritter
fritz
frivolity
frivolous
frivolously
frizz
frizzle
frizzy
fro
frock
frock coat
frog
frogman
frolic
frolicsome
from
Fromm, Erich
frond
front
frontage
frontage road
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更新时间:2025/12/17 22:31:37