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单词
protoactinium
释义
WordReference Random House Unabridged Dictionary of American English © 2024
pro•to•ac•tin•i•um
(prō′tō ak tin
′
ē əm),
USA pronunciation
n.
[
Chem.
]
Chemistry
protactinium.
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更新时间:2025/12/4 12:39:26