名词短语
中文翻译：高阶偏微分方程
同义词：
['partial differential equations', 'higher-order partial differential equations']
例句：
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1. The partialdifferential equations describe the behavior of a system at different points in time.
这些偏微分方程描述了系统在不同时间点的行为。
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2.In engineering, partial differential equations are used to model complex systems.
在工程中，偏微分方程被用来模拟复杂的系统。
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3.The partial differential equations were solved using numerical methods.
使用数值方法解决了偏微分方程。