Warning: file_put_contents(): Only 0 of 5322 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/73904.com/index.php on line 55 paraboloid英英字典_paraboloid剑桥英语解释_paraboloid柯林斯英文解释_骑士汉英词典
1. N a geometric surface whose sections parallel to two coordinate planes are parabolic and whose sections parallel to the third plane are either elliptical or hyperbolic. Equations x²/a² ± y²/b² = 2cz 拋物麪