Great western minerals has established contacts in japan , europe , and the usa who have indicated that they would be prepared to purchase significant quantities of specific rare earth products from a north american producer in order to reduce their reliance on a single source 大西部矿业集团已经和日本、欧洲以及美国接触，他们表示将准备从北美购买数量可观的某些稀土产品，这样是为了减少对单一来源的依赖。
Children with learning disabilities are in quantity . the research discovered that they have emotional and behavior problem contributing to serious difficulties in their peer relationships . not only they themselves suffer from too much pain , but also is a burden for overall improving education quality 学习困难儿童是一个数量可观的群体，研究发现，他们有明显的情绪和行为问题，同伴关系比较差，因此不仅他们自身承受着太多的痛苦，而且对于全面提高教育质量也是一个沉重负荷。
Canada and australia are also wealthy english - speaking nations with sizable immigrant populations , but their governments carefully dole out visas on the basis of would - be immigrants " education and professional background ; in other words , these nations absorb foreigners fully aware of the economic value of education , having already used it to better their lives . how many disruptive middle - class chinese - and indo - canadians pupils are there in canadian schools 加拿大与澳大利亚也是富裕的英语国家，也有着数量可观的移民，但这两国政府在发放签证上极为谨慎，他们考虑的基本点是即将成为移民的人的文化水平和专业背景，换句话说，他们所吸纳的外国人都充分意识到了教育在谋生中的作用，并且已经通过受教育而提高了他们的生活水平在加拿大学校里有几个中产阶级的中国人或印度人的孩子会调皮捣蛋？
