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。
In these three zones the quite different electrical structures indicate very complicated geological structure.
三个条带内电性结构有明显差异，反映出本地区地质构造十分复杂。
In these three zones the quite different electrical structures indicate very complicated geological structure.
三个条带内电性结构有明显差异，反映出本地区地质构造十分复杂。
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