“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	direct transition (vertical transition) direct translation approach direct transportation in main-branch routes direct trilinear decomposition direct union direct utilization of sea water direct value direct variation direct variational method direct vision objective prism direct vision prism direct-vision prism direct vision prism, direct-vision prism direct vision spectroscope direct volume rendering DirecTV satellite direct wafer bonding technology direct wreath product DirectX graph programming interface DirectX图形编程接口 di region theory di-region theory Di Renjie Dirichlet Dirichlet algebra

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