因此这个平面称为梁的中性面。
This plane is therefore called the neutral surface of the beam.
由于曲率的影响，曲线梁在其曲率平面内弯曲时的中性轴不通过横截面的形心。因此弯矩在形心处要引起正应力，从而引出所谓“等效轴力”的概念。
When a curved beam is bending in the plane of the curvature, the neutral axis of cross section is not identical with the axis of gravity due to the influence of the initial curvature.
硫脲作为电中性物质，其平面三角形的极性氢键可作阴离子的识别位点。
The hydrogen bond on the complanate triangle structure of thiourea, a kind of neutrality substance, can be the identification point to anion.
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