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
subservience
subservient
subserviently
subset
subside
subsidence
subsidiary
subsidization
subsidize
subsidized
subsidized loan
subsidy
subsist
subsistence
subsistence agriculture
subsistence economy
subsistence level
subsoil
subsonic
subspecies
substance
substance abuse
substandard
substantial
substantially
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更新时间:2025/11/17 14:54:31