These include the bulge at the equator and other deviations from sphericity, and variations in the distribution of the mass of the earth. 其中包括地球赤道部位桶腰形的凸起，一些地方不是标准的球形，以及地区质量分布的变化等。
As the eutectic time increases, the graphite morphology departs from sphericity to the abnormal morphology, and the roundness of the graphite particles decreases as well. 随着共晶时间的延长，铸件的石墨形态逐渐偏离球形，向异常化趋势发展，石墨颗粒的圆整度随之降低。
美
[sfɪ'rɪsətɪ]
