From all possible members of the spinel groups, hercynite and galaxite, were found to be the most efficient.
在所有可能矿族成员中,铁和锰被发现是最有(加剂)。
From all possible members of the spinel groups, hercynite and galaxite, were found to be the most efficient.
在所有可能矿族成员中,铁和锰被发现是最有(加剂)。
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