长椭球 meaning in Chinese

ellipsoid，prolate
prolate ellipsoid
prolate spheroid

Aggregate long ellipsoid , 13 cm long , 9 cm in diameter ; pericarp with glaucous lenticels
聚合果长椭球形，长达13厘米，直径约9厘米，外果皮有苍白色皮孔。
The hybrid algorithm raises the convergence rate of the conjugate gradient method and solves the problem for which the convergence rate of the steepest descent method get slower when the isopleth of goal function is oblong
这种混合优化算法结合了共扼梯度法和最速下降法产生搜索方向，既提高了共扼梯度算法的收敛速度，又解决了目标函数的等值线是扁长椭球时，最速下降法下降缓慢的问题，具有收敛速度快、收敛范围大、适应面广等特点。