对具有中心裂纹或半无限长裂纹的无限大板在集中力作用下得到了精确的复变应力函数。
The exact complex stress functions are obtained for a infinite plate with a centrical crack or semi-infinite crack under concentrated forces at a certain point.
科学家的知识必须精确，决不能来个半对半错或时对时错。
The scientist's knowledge must be exact. There is no room for half right or right just half the time.
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