A common GUI widget, the Tab helps to group a large number of options into smaller subsets and so add structure to, for instance, complicated dialog boxes.
Tab是一个常见的GUI窗口小部件，它帮助将大量的选项分组为较小的子集，并向复杂的对话栏(举例来说)添加结构。
So the stability analysis of complicated lattice structure becomes the crux of contemporary and large cranes' structure design and its calculation.
复杂桁架式结构的稳定性分析成为当代大型起重机结构设计计算的难点。
The results show that this method is easy and practical, and can be applied in optimum design of large and complicated structure especially with many variables.
该方法具有简便、实用等特点，特别适用于大型复杂结构（多变量）优化设计。
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