From all possible members of the spinel groups, hercynite and galaxite, were found to be the most efficient.

在所有可能的尖晶石矿族成员中，铁铝尖晶石和锰铝尖晶石被发现是最有效的（添加剂）。

youdao

From all possible members of the spinel groups, hercynite and galaxite, were found to be the most efficient.

在所有可能的尖晶石矿族成员中，铁铝尖晶石和锰铝尖晶石被发现是最有效的（添加剂）。

youdao