“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	tropical arid-semiarid climate tropical century tropical climates tropical cloud cluster tropical crop meteorology tropical cyclone tropical cyclone forecast Model tropical cyclone T index tropical depression tropical easterly jet tropical easterly wave tropical electric apparatus tropical eosinophilia tropical-extratropical interaction tropical fish tropical forest tropical fruit industry tropical fruit trees tropical grass tropical grassland resource Tropical Grasslands-Forrajes Tropicales tropicalized tropical marine climate tropical medicine tropical meteorology

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