We may use the plane stress analysis for determining deflections in the midplane of the beam . 我们可以用平面压力的分析方法来确立梁中间面的挠度。
2.
Represents the center panel of a 控件的中间面板。
3.
Gets the center panel of the 的中间面板。
4.
Provides panels on each side of the form and a central panel that can hold one or more controls 在窗体的每一侧提供面板，并提供可以容纳一个或多个控件的中间面板。
5.
Dichotomous thinking : refers to the tendency to think or evaluate events in extreme terms with no attention being paid to any " middle " ground 两极化思维：倾向以两极化的层面来思考或评估事情，忽略事件的中间面。
