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Planets, exert gravitational attraction on each other. 行星,存在着相互吸引的作用。
Which of them show the effect of gravitational attraction? 以下哪项显示地心引力的效应？
Its gravitational repulsion would offset galaxies' gravitational attraction, thereby deadening their motion. 暗能量的斥力会抵消星系间的引力，从而减弱了星系的运动。
The craft will acquire sufficient velocity to escape the sun's gravitational attraction. 飞船将会以足够快的速度来脱离太阳的引力。
If you treble the distance, the gravitational attraction gets nine times weaker. 如将距离增大两倍，则其万有引力就减小九分之八。
The components of most double stars are close enough for there to be strong gravitational attraction between them. 大多数双星的子星都很靠近，所以它们之间存在很强的万有引力。
The craft will acquiresufficient velocity to escape the sun's gravitational attraction. 飞船将会以足够快的速度来脱离太阳的引力。
They were also used, for example, to determine the gravitational attraction exerted by a lamina on particles. 例如：他们也用来确定一个薄片作用在一个质点上的万有引力。
The force of gravitational attraction between two bodies decrease as the distance between them increases. 两物体之间的引力随着两物体之间的距离增大而减小。
Many asteroids are weakly bound piles of rubble, held together by their own minute gravitational attraction. 大多数的小行星都是由碎石组成，而这些碎石靠着自身之间微弱的万有引力结合在一起。
Galactic matter orbits around a central point because its mutual gravitational attraction creates centripetal forces. 由于星系的重力产生了向心力，所以星系的物质体是环绕着一个中心点运行的。
Because of gravitational attraction, the escape velocity at the surface of a star, say, will be higher if the star is smaller in size or heavier. 恒星质量越大,体积越小,引力的羁绊便越大,所需逃逸速度亦越高。
Salellites, however, must be closely watched, for they are constantly being tugged at by the gravitational attraction of the sun, moon, and earth. 由于经常受到太阳,月亮及地球引力的影响,卫星活动必须加以密切观注。
Abstract: Describes the static calibration methods of accelerometer: gravitational attraction method, loading method and centrifuge method. 文摘:介绍了静态校准加速度计的方法：地球重力法、负载法和离心机法。
Tides are caused by gravitational attraction of the sun and moon; the weather by the motion of atmosphere under the influence of heat from the sun. 潮汐是由太阳和月亮的重力吸引所致；而天气则是因太阳的热量影像大气运动而形成的。
But if the field changes or oscillates quickly enough, it produces a gravitational attraction, just like ordinary or dark matter. 不过，要是纯量场变化或是振荡得够快，它就会产生重力相吸效应，一如普通物质或是暗物质。
The observations confirm that the gravitational attraction of ring particles to each other creates clumps, or "self-gravity wakes. 观察确认了光环内粒子间的万有引力使它们团聚成块，或者叫“自引力效应”。
Satellites, however, must be closely watched, for they are constantly being tugged at by the gravitational attraction of the sun, moon and earth. 由于经常受到太阳、月亮以及地球引力的影响,卫星活动必须加以密切的观察。
The periodic variation in the surface level of the oceans and of bays,gulfs,inlets,and estuaries,caused by gravitational attraction of the moon and sun. 潮，潮汐由月球和太阳的重力吸引造成的海洋、海湾、水湾及河口等处水面高度的周期性变化。
A body subjected to gravitational attraction by the Earth and orbiting the latter according to the law of celestial mechanics must be termed a "celestial body". 一个受到地球引力吸引，并按照天体力学定律环绕地球运转的物体必须叫做“天体”。