Lǚ / fán / tǔ / shì / shēng / chǎn / yǎng / huà / lǚ / hé / lǚ / de / zhòng / yào / yuán / liào铝矾土是生产氧化铝和铝的重要原料。Bauxite is an important raw material for producing alumina and aluminum.