Of these minerals, kaolinite, illite and chlorite are commonest.在这些矿物中, 高岭石, 伊利石和绿泥石最常见.Rock fragments, including volcanics, are common, and the matrix consists largely of kaolin and illite.常见有岩石碎块, 包括火山岩屑, 基质大部分为高龄土和伊利石...
Illiteracy threatens Britain's industrial performance. But, quite apart from that, the individual who can't read or write is unlikely to get a job...文盲的存在影响着英国的产业效益。但是，除此以外，更重要的是那些不具备读写能力的人也不太可能找到工作。Poverty and...