Portal is the absolutely necessary part of many system structures facing service (SOA). So it also introduces the relational conceptions and technology of SOA and SCA that aims at SOA.

门户集成是许多面向服务的体系结构（SOA）应用程序不可或缺的部分，所以我们也介绍了SOA及针对SOA的新规范SCA的相关概念及技术。

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There are many problems like various data types and complicated structures in modern big portal system, and these all make it difficult to create a union search platform for the system.

现代大型门户信息系统普遍具有数据类型繁多，系统结构复杂等特点，这一系列特点都给系统的统一检索带来了困难。

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Light steel portal frames have been extensively used for industrial mill buildings in recent years, and much attention is being paid to the fireproofing of steel structures.

轻钢门式刚架近年来被工业厂房大量采用，钢结构防火问题被大家关注。

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