我们的下一站是莱博克斯山谷，那里随处是铝矾土的岩石。

Our next stop is the valley of Les Baux, where bauxite rocks are everywhere.

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铝的，矾土的铝或明矾的，与其有关的或包含其的。

Of, relating to, or containing aluminum or alum.

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对比研究了几种铝矾土的化学组成、相组成和分散性能。

The chemical composition, petrographic analysis and dispersing property of kinds of bauxitic clay are compared.

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Alumina is really stable, which is why it takes so much energy to make aluminum.

矾土相当稳定，这就是为什么需要消耗大量的能量制备铝了。

麻省理工公开课 - 固态化学导论课程节选