1.the gravitation of the middle classes to the suburbs.
中产阶段涌向郊区的趋势
2.this recent gravitation towards the Continent.
最近向欧洲大陆的人员流动。
3.It is gravitation that causes the apple to fall.
是地心吸引力使苹果下落。
4.By gravitation the sun and planets act and react upon one another.
太阳与行星通过引力发挥作用并相互影响。
5.The sun’s gravitation was bending the beam of light.
太阳的引力使光束弯曲。
6.GRG是一个计算机代，它为解决在微分几何，地心引力和场论中的问题。
GRG is a computer algebra program designed for the problems in the differential geometry, gravitation and field theory.
7.The Coulomb-force in a star is equal to 3.4 octillion times of universal gravitation (neglect the effect of electricity charge tending to the surface).
，它为解决在微分几何，地心引力和场论中的问题。
