“非负特征形式”的概念、定义、翻译、参考文献-科学参考

单词	非负特征形式
释义	非负特征形式 Mathematics ＞偏微分方程＞椭圆型方程＞释义 non-negative characteristic form非负特征形式 nonnegative characteristic form非负特征形式，非负特征型^†
随便看	planitia Planitia Descensus planitron planizer plank Plank function Plank Road Remains at Sanmenxia Plank's law plankton plankton community plankton sampler planktothrix agardhii virus plan law planned capacity of thermal power plant planned commodity abolishment planned ecological industrial park model planned economic system planned maintenance Planned Obsolescence planned population migration planned preventive maintenance system planned price of agricultural products planned target planned unit development Planned Unit Development Regulations

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。