用一个平面去截一个几何体，得到的平面图形叫做截面；截面的面积为截面面积。
This article takes the simple steel plate beam as example, the damage is simulated by reducing the sectional area where the damage is designated by theory analysis, from which five damage cases are come into being.
本文以简支钢板梁为例，理论分析通过削减指定损伤处的正截面面积来模拟结构的损伤。
参考来源 - 基于模态参数结构损伤检测的实验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
它有圆形的截面面积，并长期船体。
It has the circular shape of sectional area, and a long hull.
飞机的长度和最大横截面面积之比也会影响音爆的强度。
The ratio of aircraft length to maximum cross sectional area also influences the intensity of the sonic boom.
在其他换言之，它是通过不同的截面面积在一个严格的形式。
In other words, it does this by varying the cross-sectional area in an exacting form.
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