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单词
ionium
释义
io·ni·um
\īˈōnēəm\
noun
(
-s
)
Etymology:
ion + -ium;
so called from its ionizing action
:
a naturally occurring radioactive isotope of thorium having mass 230
— symbol
Th
230
or
Io
; see uranium series
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更新时间:2026/3/25 9:51:26