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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
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springtime
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springy
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sprinkling
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spritz
spritzer
sprocket
sprout
spruce
sprung
spry
spryly
spud
spume
spun
spunk
spunky
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更新时间:2025/3/15 8:04:01