“Pfaff-Birkhoff principle”的概念、定义、翻译、参考文献-科学参考

单词	Pfaff-Birkhoff principle
释义	Pfaff-Birkhoff principle Encyclopedia 理学力学变分原理释 Pfaff-Birkhoff principle普法夫-伯克霍夫原理将G.D.伯克霍夫在1927年给出的一类积分变分原理推广到包含时间的情形从而得到的积分变分原理。
随便看	right of self-determination right of sexual expression right of spouse right of status right of succession right of the lord right of the producer of phonograms and videograms right of the property claim right of translation right of transmission and related rights right of using curtilage right of visit right of way right operation right operator right operator domain right order right-ordered group right-ordered set right Ore condition right Ore domain right Ore ring right Ore set right parallelepiped right parallelepipedon

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。