求翻译：我经常可以见到他在课余期间同学在探讨课堂中的问题。在偏微分方程的学习中，一次他来请教我关于一个降维法(Dimension Reduction Techniques), 就是来解高维(High dimensional)波动方程的Cauchy问题的原理，经解释后，他明白了低维的问题实际上就是高维问题中的一种特殊情形，而高维问题普遍的可适用三位情形的解法（球平均方法（The method of spherical means））。他很快掌握了这种方法，在接下来的小测验中也取得了优秀的成绩,表现了不俗的学习和理解能力。最终，在最后的期末考试中，他取得了83分的好成绩。是什么意思？

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I often see him in discussion on the problems in the classroom students during the after school. In partial differential equation of learning in the, once he to consult I on a drop dimension method (Dimension Reduction Techniques), is to solutions high dimensional (High dimensional) fluctuations equ

I often see him in discussion on the problems in the classroom students during the after school. In partial differential equation of learning in the, once he to consult I on a drop dimension method (Dimension Reduction Techniques), is to solutions high dimensional (High dimensional) fluctuations equ