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木板木块类问题用到力学的很多规律,物理情景也复杂,它们大多可分解为三种小模型中的一种或几种,这样可以从容求解.
There are many laws of mechanics that are used in wood-wood blocks, and the physical scene is also complex. Most of them can be decomposed into one or more of the three small models, so that they can be solved easily.