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单词
radioactinium
释义
ra·dio·actinium
\“+\
noun
Etymology:
New Latin, from
radio- + actinium
:
the radioactive isotope of thorium of mass number 227 formed by disintegration of actinium
— symbol
RdAc
or
Th
227
; see actinium series
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unsplit
unspoiled
unspoken
unsporting
unsportsmanlike
unspotted
unspottedness
unspring
unsprung
unsprung
unsprung weight
unspun
unstability
unstable
unstable
unstable equilibrium
unstableness
unstable oscillation
unstably
unstack
unstaid
unstained
unstalked
unstamped
unstarred
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更新时间:2026/9/25 12:16:54