名词
中文翻译：非平稳性
同义词：
['unstable', 'unsteady', 'inconsistent']
例句：
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1.The stock market is highly nonstationary, making it difficult to predict future trends.
股票市场高度不稳定，难以预测未来趋势。
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2.The data collected from the experiment showed a significant nonstationarity in the response.
从实验中收集的数据显示出响应的显著不稳定性。
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3. The nonstationarity of the system makes it challenging to design an optimal control strategy.
系统的非稳定性使得设计最优控制策略变得困难。