主要的病理变化是肠道上皮的黏液变性，并累及多系统器官的一般变性；
The main pathological change was the mucoid degeneration of intestinal epithelial cells, and multi-system organs were involved.
股票市场是一个复杂的非线性动态系统，利用传统的时间序列预测技术很难反映市场变化的多因素，非线性、时变性等特点。
Stock market is a complex non-linear dynamic system. It is difficult to reflect market with the trait of more factors, non-linear and time variety using the traditional timing prediction technology.
符号时间的增加，使得OFDM系统具有良好的抗多径性能，但同时也使OFDM系统对于无线移动信道的时变性更加敏感。
The increasing of symbol duration makes OFDM more robust against multipath transmission, whereas, it makes OFDM more sensitive to the time varying of wireless mobile channels.
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