请输入您要查询的英文单词:
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
suzerainty
svelte
Svengali
SW
swab
swaddle
swaddling clothes
swag
swagger
Swahili
swain
swallow
swallowtail
swam
swami
swamp
swampy
swan
swan dive
swanky
swan song
swap
swap meet
swarm
swarthy
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更新时间:2025/12/5 8:00:42