问－36套里面铝矿石那篇文章，感谢。

nicolezhangUID: 3597455

默默想问 aluminum, aluminum-bearing minerals and rocks， aluminum ore,bauxite 都是什么关系＝ ＝哭。文科生真的不知道。前两题直接选不对。
Eight percent of the Earth‘s crust is aluminum, and there are hundreds of aluminum-bearing minerals and vast quantities of the rocks that contain them. The best
Line aluminum ore is bauxite, defined as aggregates of alumi- 5 nous minerals, more or less impure, in which aluminum is present as hydrated oxides. Bauxite is the richest of all those aluminous rocks that occur in large quantities, and it yields alumina, the intermediate product required for the production of aluminum. Alumina also occurs naturally as the mineral corundum, but corundum is not found in large deposits of high purity, and therefore it is an impractical source for making aluminum. Most of the many abundant nonbauxite aluminous minerals are silicates, and, like all silicate minerals, they are refractory, resistant to analysis, and extremely difficult to process. The aluminum silicates are therefore generally unsuitable alternatives to bauxite because considerably more energy is required to extract alumina

nicolezhangUID: 3597455

是不是这个关系，hydrate oxide在bauxite里面，bauxite在aluminum ore里面。上文说的rock 就是aluminum ore。bauxite就是aluminum－bearing mineral的一种。和下面那个corundum就是对应的关系。＝ ＝我的理解只能到这了。望大神帮我解脱。

wsjenglishUID: 3643341

nicolezhang 发表于 2015-8-1 16:04
是不是这个关系，hydrate oxide在bauxite里面，bauxite在aluminum ore里面。上文说的rock 就是aluminum ore ...

理解都对

nicolezhangUID: 3597455

但是还是做不对题。