引力

Planet Earth is heavy, so heavy in fact that to get off it, you have to do this.

地球是十分重的，要摆脱它的引力，就要出动这个大家伙了。

Newton showed that the motions of objects on Earth and of celestial bodies are governed by the same set of natural laws by demonstrating the consistency between Kepler's laws of planetary motion and his theory of gravitation, thus removing the last doubts about heliocentrism and advancing the scientific revolution.

他通过论证开普勒行星运动定律与他的引力理论间的一致性，展示了地面物体与天体的运动都遵循着相同的自然定律；为太阳中心说提供了强有力的理论支持，并推动了科学革命。

Rather than discussing higher derivative gravity (where our lunch discussion took off) I would like to discuss a much simpler system.

而不是讨论高阶导数引力我要讨论一个非常简单的系统。

Lens Crafters Opticians reports that horn-rimmed glasses are flying off the shelves faster than they can be restocked. Several exotic car shows around the country have been cancelled due to lack of interest. iPhone jail-breaking competitions have been set up in their stead.

微孔镜片公司报道牛角框眼镜已经卖脱销，而国内几款即将上市的新型汽车也因"缺乏新引力"被取消发布，连 iPhone 上日益火热的越狱类游戏也被别的游戏所取代。

He discourse d impressively on Newton's theory of gravity.

他讲述了牛顿的引力定律，给人以深刻的印象。

When electron accelerates, its charge quantity won't change, as a result, its electromagnetic mass is constant, and the electromagnetic mass won't satisfy Lorentz transformation,thus, there is obvious inconsonance if we treat electromagnetic mass as a part of the gravity mass ---- as long as we insist the idea that the charge quantity of any electron is a constant.

当电子加速运动的时候，其电量是不会改变，所以其电磁质量不会发生改变，电磁质量不满足Lorentz transformation，因此把电磁质量作为引力质量的一部分存在着不协调性——只要维持电子电荷值不变的观念，这个问题不管怎么也解释不通。

One of a set of independent variables that express the coordinates of a point.

牛顿的目标是要用数学形式来表示不同物体之间的引力。

Studies of the gravity field of the Earth indic ate that its crust and mantle yield when unusual weight is placed on them.

对地球引力的研究表明，在不寻常的负荷之下地壳和地幔会发生位移。

The result shows that the GMCs so formed consist mainly of individual clouds located close to one another from inelastic collision and self-gravitation under a velocity dispersion.

研究结果表明，形成的巨分子云主要由其附近的分子云组成。由于速度弥散的作用，非弹性碰撞和自引力使分子云聚合在一起，以这种方式形成的巨分子云是小质量的。

The WEP states bodies of different structure and compositions have the same ratio of gravitational mass to the inertial mass in uniform gravitational field.

弱等效原理是爱因斯坦广义相对论的基本假设之一，它指出"在均匀引力场中，不同组份物体的惯性质量和引力质量之比相等"。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。