All things being equal, which they rarely are, the higher the cyclical stress level on an aircraft structure, the fewer the number of reversals it can withstand before breaking.

所有的事情很少是平等的，飞机结构上的周期性压力水平更高，破碎前它可以承受倒转的数字就更少些。

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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.

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。

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There are many negative ways to deal with stress such as use drugs or alcohol, or breaking things, but these have serious consequences such as health problems, addiction, and legal problems.

处理压力有许多消极的方式，例如：用药物，酒精，打破东西，可是这些都有严重的法律后果，例如：健康问题，成瘾和法律问题。

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All things being equal, which they rarely are, the higher the cyclical stress level on an aircraft structure, the fewer the number of reversals it can withstand before breaking.

ECONOMIST: Aircraft fatigue