For each double cone, the opposite pulls from two parts of the sphere exactly cancel.
就每一双锥面来说，球壳的两个部分所产生的相反引力正好对消。
2
It consists of standard sources integrated sphere, double grating monochromator, detectors, and electronics-microcomputer system.
它由标准光源，积分球，双光栅单色仪，探测器及电子学—计算机系统组成。
3
A double integrating sphere system was developed to investigate the effect of the osmotic agent of glycerol on the optical properties change of mouse skin.