fore some meaning in English

四人一组

At first , after the dynamic characteristics of the plane and the spatial supporting systems were studied , fore some steps fixed frequency and shape of vibration were gained . secondly , several design parameters which influence the dynamic characteristics of this kind system were discussed , including pre - tension value in the cable , cross - section of the cable , cross - section of steel - bar and form change . some applied decisions were found
首先，对平面和空间索桁支承体系的自振特性进行研究，得到体系的前几阶固有频率和振型形式；进而探讨了索的预拉力、拉索截面面积、撑杆截面面积、形状改变(撑杆长度l )等主要设计参数对体系自振特性的影响，得出了一些有益的结论，为体系设计和施工提供意见和依据；最后，对体系的风振特性进行了分析，用幕墙风荷载规范对几种索桁支承体系形式进行风荷载计算。