如果将蜗牛的壳尖朝上而让它的口对着自己这样放着，它的壳往往会向着右边旋去，一般情况下很少会向左转。
Hold a snail with the tip of its shell pointing upwards and the opening towards you, and the shell will normally coil away to the right. Less commonly, it will coil to the left.
新单元的计算方法不改变壳体结构的一般假设条件，利用厚度方向分段积分来完成问题的求解，并对层合截锥壳进行计算。
The common hypotheses of the shell structure aren't alterative in the new finite element method and it finishes the solution through the integral of the different laminas.
大跨网壳结构具有高度的几何非线性，结构设计一般由整体稳定性控制。
The structural design of large-span latticed shell is controlled by global stability due to the geometric nonlinear property.
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