“non negative characteristic form”的概念、定义、翻译、参考文献-科学参考

单词	non negative characteristic form
释义	non negative characteristic form Mathematics ＞偏微分方程＞椭圆型方程＞释义 non-negative characteristic form非负特征形式
随便看	Pingjian Buxiaosheng Pingjiang Opera Pingjiang Xian Pingjinguan Series Ping Jinya Pingju Opera Pingju Opera Monographs Pingju opera music pingle coalfield Pingle Xian Pingle Zhen Pingliang Museum Pingliang Shi Pingliangtai Pingli Nüwa Yinfeng tea Pingli Xian Ping Lu Pinglu Canal Pingluo Xian Pinglu Qu Pinglu Xian PingMiao JiLue PingMin Park in BeiBei Pingnan Xian Ping Opera Troupe of Tangshan City

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。