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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
polymorphous
polynomial
polyp
polypeptide
polyphonic
polyphony
polypropylene
polysaccharide
polysemous
polysemy
polystyrene
polysyllabic
polysyllable
polytechnic
polytheism
polytheistic
polyunsaturate
polyunsaturated
polyurethane
polyvalency
polyvalent
polyvinyl chloride
pomade
pomander
pomegranate
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更新时间:2025/12/8 3:36:41