surrounding protective structure 基本例句 围护结构 The influences of these factors, which are important to guide the design and application of single strut arched retaining structure, are described in detail in this paper.详细地分析了各因素对单支撑拱形围护结构性状的影响规律，这些规律对单支撑拱形围护结构的设计与应用具有重要的参考价值。