他将风力公式应用到他的模型中，并假定树枝受到风力作用而断裂的概率是恒定不变的，据此他推导出了达·芬奇公式。
When he plugged that wind-force equation into his model and assumed that the probability of a branch breaking due to wind stress is constant, he came up with Leonardo's rule.
假定你出版了一部大学教材，里面有大量的数学公式和化学表达式。
Need more convincing? Imagine you have a college text laden with math and chemical formulas.
在阶段性地展示了建立此模型基本假定的过程后，给出了风险保费与预测值的可信性估计的简明公式。
After the procedure used to establish the basic assumptions for this model is shown, the concise formulas of credibility estimator for risk premium and prediction are given.
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