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单词
protactinium
释义
protactinium
noun
uncountable
chemistry
UK
/
ˌprəʊtækˈtɪniəm
/
DEFINITIONS
1
1
a chemical element that is a radioactive metal. Its symbol is Pa.
Synonyms and related words
Chemical elements
actinium
alkali metal
aluminium
protactinium
noun
uncountable
chemistry
US
/
ˌproʊtækˈtɪniəm
/
DEFINITIONS
1
1
a chemical element that is a radioactive metal. Its symbol is Pa.
Synonyms and related words
Chemical elements
actinium
alkali metal
aluminum
随便看
callous
calloused
call out
call-out
callow
call round
call someone to account (for something)
call (someone’s) attention to
call someone’s bluff
call something into existence/being
call something into question/doubt
call the shots/tune
call the tune/shots
call time
call time on something
call to action
call to arms
call up
call-up
call upon
callus
call waiting
call/bring/throw something into question
calm
calm down
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更新时间:2025/3/28 8:28:17