The authors want to deduce a brief formulation, and use all-purpose program to get exact result for echelon, rectangle and rotundity cross section.
作者想推导简短的公式，对梯形、矩形和圆形断面采用通用的程序，以得到准确的结果。
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The basic purpose of the IHR is to help the international community prevent and respond to acute public health risks that have the potential to cross borders and threaten people worldwide.
The name "Cross References" is somewhat generic, because the view is general-purpose and can be extended to show any information relating to the current element selected in the active editor.