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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
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celtic
celtic tiger
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census-designated place
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centaur
centenarian
centenary
centennial
center
center around
-centered
centered
centerfold
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更新时间:2025/10/29 22:16:19