那一年，查尔斯·固特异偶然把橡胶和硫磺滴到热炉子上，引起橡胶象皮革一样焦化但依然保持良好的可塑性和弹性。
In that year, Charles Goodyear accidentally dropped rubber and sulfur on a hot stovetop, causing it to char like leather yet remain plastic and elastic.
同时给出了塑性激波后方弹性卸载区内的应力和质点速度分布规律。
Distributions of stress and particle velocity in the elastic unloading region behind the plastic shock wave are given as well.
借用物理学领域中有关材料的塑性和弹性的理论，用类比推理方法研究股票价格变化中体现的塑性和弹性。
This paper studies the plasticity and the elasticity of stock prices via analogical reasoning, with reference to material plasticity and elasticity in the field of physics.
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