Extension and restriction are both valid methods for a substitution; however, union is not a valid derivation technique according to the XML Schema specification (see Resources).
扩展和限制是替换的两个有效方法。但是，根据XML模式规范，联合并不是有效的派生技术(参阅参考资料)。
"The Freelancers Union provides a sense of stability knowing that there is a place to go to get help, contacts, ideas, and other resources," says Nelson.
尼尔森说道“联盟提供了某种意义上来说稳定的方式，让你知道在哪里可以获得帮助，联系，主意和其他资源。”
Back then the Soviet Union could not meet people's growing expectations and the economy was running out of resources.
那时的苏联无法满足人民日益增长的需求而经济上的资源却在枯竭。
For the first time in history, countries with significant resources have united under one World Union.
为在历史上第一次，国家投入大量资源，有美国的下一个世界联盟。
European Union leaders have recently been warned that climate change may well lead to a protracted battle with Russia over natural resources freed up by melting polar ice caps.
欧盟领导人于近期收到警告：气候变化或会引起未来在北极由于冰山融化而产生的资源的所有权上与俄罗斯出现争端。
Kaolin resources are mainly located in Union Township just Spiced slope near the reserves of 3.5 million cubic meters, mainly for daily-use ceramics, paper, chemical industries.
高岭土资源主要分布在义联庄乡五香坡附近，储量为350万立方米，主要用于日用陶瓷、造纸、化学工业等。
In the period of cold war, the superpowers of USA and the former Soviet Union scrambled for Africa attributed to its rich natural resources and important strategic position.
冷战时期，非洲由于丰富的自然资源和重要的战略位置成为美苏两个超级大国争夺的重要区域。
The sub project of union implemented as planned, established Collaborative model of global resources of outsourcing-based virtual project.
联盟内各子项目按计划实施，建立外包型虚拟项目的全局资源协同模型。
Basic work for the sharing of library information resources includes cooperative development of library collections, online union cataloging and online reference services.
图书馆信息资源共享的基础工作，包括合作馆藏建设、联机联合编目及在线信息咨询等。
The medias union is a vigorous way to integrate media resources, construct media resultant force and cope with the market competition in the fierce media competition.
媒体联动是整合媒体资讯、打造传媒合力、应对市场竞争的有效途径。
The former Soviet Union invested considerable human, material and financial resources in housing construction, and scored remarkable achievements.
前苏联在住宅建设方面投入了巨大的人力、物力、财力，取得了令人瞩目的成就。
The former Soviet Union invested considerable human, material and financial resources in housing construction, and scored remarkable achievements.
前苏联在住宅建设方面投入了巨大的人力、物力、财力，取得了令人瞩目的成就。
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