能源循环车轮由碳纤维-芳纶复合材料制成，从而减轻重量，增强整体强度。
Energy Return Wheel is made out of carbon fiber and kevlar components that decrease the weight and increae the overall strength.
其他结构特性（如，侧体强度，由整车重量计算得到的车顶强度）
Other structural characteristics (e.g., side strength, roof strength as a function of vehicle weight).
所以100%的屈服强度增加意味着零件重量能够减少三分之一。
So a 100% increase means that a component could be redesigned to lose about a third of its weight.
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