引力

Then, the orbit of the Moon about the earth could be a consequence of the gravitiational force, because the acceleration due to gravity could change the velocity of the Moon in just such a way that it followed an orbit around the earth.

如此说来，月球的轨道应该是地球引力的结果。因为引力产生的加速度会改变月球的速度，使它按一个绕地轨道运转。

In the core of the larger spiral structure of NGC 1300, the nucleus shows its own extraordinary and distinct "grand-design" spiral structure that is about 3,300 light-years long. Only galaxies with large-scale bars appear to have these grand-design inner disks — a spiral within a spiral. Models suggest that the gas in a bar can be funneled inwards, and then spiral into the center through the grand-design disk, where it can potentially fuel a central black holes. NGC 1300 is not known to have an active nucleus, however, indicating either that there is no black hole, or that it is not accreting matter.

星系演化除了像两个星系相撞那样的剧烈作用之外，还有自己内部很慢的演化，因为一个星系总会有一些引力不稳定，如上图中的NGC1300，它是一个棒旋星系，这种bar结构导致的引力不完全对称会驱使很多气体和尘埃损失角动量往里面落，我们可以清楚的看到dust lanes，有点像黑洞的吸积，但这个星系是个非活动星系，目前还没有黑洞存在的明确证据，but我相信肯定是有的，没有比在星系中心放一个黑洞再完美不过的事情了，或许这些下落的dust lanes是黑洞发光的开始呢。

We find that a region of negative specific heat describing the character of gravity also exists in canonical ensemble, which is remarkably distinguished from the result of traditional statistical mechanics that the specific heat must be positive in that ensemble, implying that the gravitating system may also be described by canonical one.

2在正则系综中，我们同样根据广义统计力学对引力Toy模型进行了研究，发现也会出现类似于微正则系综中的负比热现象，这明显区别于传统的统计力学中比热必须非负的结论，从而得出在Tsalllis统计下正则系综也可以描述引力系统的结论。

According to the principle of quantum mechanics, exploringly presented the possible mechanism of large-scale expansion at forepart of earth, quanta earth tectonic dynamic mechanism formed from super solid state of centrosphere material, presented the integral tectonic criterion in the process of evolution of earth system considering potential of quanta, potential energy of gravitation and heat energy as a result of special state of matter of centrosphere.③Established the evolutional model of finite nonlinear expansion to of integral tectonic dynamic of earth expansion., presumed and gived the skeleton model of original forepart earth before expanding. Applying the universal large scale finite element software, for the first time considered heat power and self gravitation in the same model of tectonic dynamic model simultaneously.

较系统地讨论了地球膨胀整体构造动力的若干基本理论问题：①分析汇总了地球演化产生、积累和以各种形式损耗的总能量，根据考虑引力势能与热能的维里定理，对现时地球整体动力状态进行判断；②根据量子力学原理，探索性地提出地球大规模膨胀的可能机制——地核物质超固态形成量子简併压强产生的动力——地球量子动力，给出了考虑地核特殊物态的量子势能、引力势能和热能的地球系统演化过程中的整体动力状态判据；③建立了地球膨胀整体构造动力的非线性有限膨胀演化模型，推测给出膨胀前早期地球的轮廓性模型。

The total gravity force on the star from the stars enclosed by its circular orbit can be treated as if they are concentrated at the center.

对于一个离中心为 r 的恒星来讲，来自轨道内的恒星的引力与把它们集中在星系中心的一样，来自轨道外的恒星的引力合力为零。

By introducing the temperature and acentric factor into the mixing rule of attractive part of the equation of state, a new expression was set up.

对状态方程的引力项混合规则进行了改进，将温度和表示物质结构的偏心因子引入引力项混合规则中的相互作用参数，建立了引力项相互作用参数表达式。

First, the mixing rule of temperature calculation equation was modified. The content and acentric factor of second component were introduced into the interaction parameter, and a new equation of critical temperature for mixture were set up as

对状态方程的引力项混合规则进行了改进，将温度和表示物质结构的偏心因子引入引力项混合规则中的相互作用参数，建立了引力项相互作用参数表达式。

Studies of the gravity field of the Earth indicate 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对地球引力的研究表明，对地球引力的研究表明发生位移。

By a Law of Nature with us, there is a constant attraction to the South; and, although in temperate climates this is very slight -- so that even a Woman in reasonable health can journey several furlongs northward without much difficulty -- yet the hampering effect of the southward attraction is quite sufficient to serve as a compass in most parts of our earth.

我们这儿有一条自然法则，南方有恒定的引力；尽管是在温和的气候下，这种引力非常微弱--因此即使是一位妇女，只要健康状态良好，也能向北方旅行数弗隆，这完全没问题--但是，在地球上的大多数地方，南方引力的阻碍作用也足够定向了。

This force of 1250 "units" is going to be much too large when thinking about moving an object a certain number of pixels along the screen . To create nice smooth-looking visualizations , therefore , we often need to develop clever ways of limiting factors within the system ( having a maximum velocity , a minimum distance , etc .). In the examples below, you'll see some strategies implemented for "faking it".

这个地方因为我们为了让万有引力的作用在程序表现的视觉中明显一点，将引力系数 G 设置为1了，这个值远大于真实世界的引力系数，直接导致了这2个物体间的引力有1250，而这个力显然太大了，为了让我们的程序运转的更正常，看起来更像真的，我们要人为的约束一下2个物体间的计算距离。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了