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atomic number 25
n.
a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
同义词:
manganese
Mn
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atomic number 25
n.a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals 同义词:manganeseMn
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