A neuron is not a simple organic cell, but a very powerful, electrically excitable biological processor.
神经元不只是一个简单的有机细胞，它还是一个非常强大的、对电流敏感的生物处理器。
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As an important sample to enrich the contents of medical physics, excitable system in nonlinear dynamics is inducted, and used to character the properties and behavior of neuron and cardiac cell.