首页 | 翻译 | 影视 | 论坛 | 索引 1)  great circle 大圆线 2)  great circle 大圆 1. In this article,“celestial coordinate system”, the difficult point in the teaching of the Conspectus of the Earth, is analysed and studied and three key points are proposed: finding the joint point, establishing an coordinate system mode that can be accepted easily and giving out the basic dots & great circle system very distinctly. 本文主要对《地球概论》中的教学难点“天球坐标系” ,结合教学实践与有关教材进行深入的分析和研究 ,提出突破这一教学难点的 3个关键 :找准衔接点 ;建立易于掌握的坐标系模式 ;清楚地给出基本点和大圆的系统。 3)  large arc 大圆弧 1. In this paper,a method of large arc grinding using multi-bar linkage in commercial plan-grinding machine was introduced,in which the straight movement of the machine table was transformed to small rotating of the worked parts. 提出一种在普通平面磨床上利用空间机构加工大圆弧曲面的方法,将工作台的直线运动转化为工件的微小转动,砂轮在工件圆弧表面作包络曲线运动,机构简单,调整方便。 4)  Large Section Round Bar 大圆钢 1. Three-Dimensional Thermal-Mechanical-Coupled Elastoplastic Finite Element Analysis on Large Section Round Bar Continuous Rolling with Oval-Round Passes; 椭-圆孔型连轧大圆钢三维热力耦合弹塑性有限元分析 5)  large oblong 大圆矩形 6)  overcentre coiling 大圆条 参考词条 补充资料：大圆线 大圆线是球面上半径等于球体半径的圆弧。大圆线是连接球面上两点最短的路径所在的曲线。大圆线是球面上半径最大的圆弧。 说明：补充资料仅用于学习参考，请勿用于其它任何用途。 ©2008 dictall.com