The foreword mainly introduces legal doctrine and predicament of the real right, and its necessity existing.

引言主要介绍物权法定主义及其困境，以及其存在的必要性。

Of necessity, inventions in chipmaking rely on lots of existing technology, which is itself covered by hundreds of patents held by numerous other firms.

在芯片制造领域的发明不可避免很大程度上要依靠现有的技术，而这些技术又由众多其它公司的数百项专利所覆盖。

Often there is a necessity to connect to existing middleware or legacy enterprise system within an organization or outside.

通常有必要在组织的内部和外连接到现有的中间件或旧的企业系统。