“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	hair hair and makeup artist for a female role hair bulb hair cell hair color hair cords Hair Embroidery of Avalokitesvara Images hair examination hair follicle hair follicle hair hair hygrometer hair index Hai River area comprehensive development program hairline hairline sore hair matrix hair papilla hairpin hair-pin curve location hairpin DNA hairpin loop hairpin polyamide hairpin-shaped makeup tool hairpin structure hair pores

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。