?波科罗夫斯克
百度_狄少华吧_又续 ... polar conic 极圆锥曲线 polar conjugate points 极共轭点 polar coordinate system 极坐标系 ...
The town's name had been changed from Boronsk to Marx to Pokrovsk and then to Engels the name of Marx's German collaborator being thought appropriate for the capital city of the Volga Germans.
ECONOMIST: Alfred Schnittke
英汉双解词典包含3185865条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。