1·Now, that is only for a point mass.
那只是对于一个质点而言的。
2·The results show that the metric is similar to that caused by a point mass.
结果表明：引力场度规与点质量引起的相似。
3·If you are going to push that object that would be really where the equivalent point mass would lie.
给物体一个推力，就等价于推力作用在重心的情况。
4·The center of mass of a system is defined as follows: I have here some kind of an object not just a point mass, but it has a finite size.
系统的重心,是这样定义的：,我有一个物体,不是有棱角的物体，但它大小有限。
5·A few months later, Karl Schwarzschild gave the solution for the gravitational field of a point mass, showing that something we now call a black hole could theoretically exist.
几个月之后，卡尔·史瓦西给出了点质量引力场解决方法，表明我们现在称做黑洞某物理论上可以存在。
6·As mass production techniques were refined in the 19th century, the price of pianos dropped to the point that a larger proportion of the population could afford to own them.
随着19世纪大规模生产技术的改进，钢琴的价格下降到更多人都买得起的程度。
7·Excessively skinny models have been a point of controversy for decades, and two researchers say a model's body mass should be a workplace health and safety issue.
几十年来，过瘦的模特一直是争议的焦点，两名研究人员表示，模特的体重应该是职场的健康和安全问题。
8·The cinema did not emerge as a form of mass consumption until its technology evolved from the initial "peepshow" format to the point where images were projected on a screen in a darkened theater.
电影播放技术由最初的“西洋镜”的形式演变而来，直到其发展到一个时期；在这个时期中，影像被投影到幽暗的影院屏幕之上，电影才作为一种大众消费的形式而出现。
9·The cable would connect with some point on Earth located at the equator, and would allow mass to be transferred to orbit using electricity instead of rocket fuel.
该电缆将连接一些位于地球赤道上的点，这将允许群众被运送到到轨道使用电来代替火箭燃料。
10·Like all clouds, it forms when the air reaches its dew point, which is the temperature to which an air mass must be cooled for the water vapor in it to condense into liquid droplets.
和其他云一样，它是当空气达到凝结点，即空气团的温度冷却到使其中的水蒸气凝结成液态水滴的温度时形成的。