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 极三角形
 polar triangle
 THE COMMON SELF POLAR TRIANGLE OF CONICS 二次曲线的公共自极三角形 短句来源
 相似匹配句对
 THE COMMON SELF POLAR TRIANGLE OF CONICS 二次曲线的公共自极三角形 短句来源 The Polar Algorithm and Triangle Algorithm on Point Pattern Matching Problems 点匹配问题的极坐标算法和三角形算法 短句来源 Bungee Jump 蹦极 短句来源 The Heron Triangle Heron三角形 短句来源 Fibonacci Triangle Fibonacci三角形 短句来源

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 In this paper we discuss following problems:1. If two conics are double contact, then, there are common self polar triangles.2. Try to find the suficient and necessary conditions that a triangle is common self polar with respect to both conics C_1 and C_2. 本文从代数和几何两个方面说明了两条二次曲线相切于两不同的点时有公共自极三角形,同时还给出了两条二次曲线以及由它们决定的二次曲线束有公共自极三角形的条件。 A leading and decisive factor in the economic system of ancient Chinese society, the state played a basic part in easing up conflicts between classes. Meanwhile the state also stood for a social group with separate economic interest of its own. As a result, the contradiction between the state's interests and its function drove it in the midst of social contradictions, whose evolution determined the destiny of the state and the nation. The existence of the state as a group of interest made possible endurance... A leading and decisive factor in the economic system of ancient Chinese society, the state played a basic part in easing up conflicts between classes. Meanwhile the state also stood for a social group with separate economic interest of its own. As a result, the contradiction between the state's interests and its function drove it in the midst of social contradictions, whose evolution determined the destiny of the state and the nation. The existence of the state as a group of interest made possible endurance of a triangular economic structure with the landlord, the peasant and the state each taking a pole. Connected with the three poles was an interbinding link which contributed to the very strong stability of this social economic structure and even the whole society. 国家是中国古代社会经济结构中主导性乃至决定性的因素。缓和阶级冲突是国家的基本职能。国家又是一个有着自己独立经济利益的社会集团。国家利益与国家职能相矛盾,使国家与社会处于矛盾之中,矛盾的发展状况决定了社会和国家的命运。国家利益集团的存在使社会形成地主、农民、国家各为一极的三角形经济结构,其间存在着一个相互制约的链条,并使社会经济结构乃至整个社会呈现很强的稳定性。强化国家职能、限制国家利益,这是社会经济发展的必需条件。
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