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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
home-school
home schooling
home shopping network
homesick
homesickness
homespun
homestead
Homestead Act, the
homesteader
home stretch
hometown
home visit
home visitor
homeward
homework
homey
homicidal
homicide
homily
homing
homing device
homing pigeon
hominid
hominy
homo-
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更新时间:2025/3/26 11:31:42