Upwards of a billion stars in our galaxy have burnt up their internal energy sources, and so can no longer produce the heat a star needs to oppose the inward force of gravity.
在我们的星系中，超过10亿颗恒星已经耗尽了它们的内部能量来源，因此无法再产生恒星所需的热量来对抗向内的引力。
When plants shoot on the earth, their stems grow away from the gravity (the force that keeps your feet on the ground), and so they always shoot upwards.
当植物在地面上生长时，它们的茎生长得方向与重力相反（重力是让你的脚留在地面上的力量），因此它们总是向上生长。
The poet, after all, is subject to gravity in Frost, to the force of the earth.
这个诗人，弗罗斯特，终究还是受制于地心引力，受制于地球的力量。
Unfortunately, there is no place, yet, for the fourth universal force, gravity.
遗憾的是，目前在表格中还没有第四种力，引力的位子。
That is, you minimize potential energy and you see things falling under the force of gravity and so forthgoing to potential energy minima in conformance with this result.
换句话说，你使得势能最小化,然后发现我们关注的东西,在重力或者其他力的作用下下落,直到势能最小的地方,这和我们刚才的结果是一致的。
You can also try changing your position: Get up on all fours, or squat; the force of gravity might shift the baby's head.
你也可以尝试改变你的姿势：起床四肢着地，或者蹲着；让重力作用在婴儿的头部。
This causes matter distribute itself in a way that maximises entropy. And the effect of this redistribution looks like a force which we call gravity.
这使得物质以熵值最大化的方式分配自身，而这一重新分配的结果被我们称之为重力。
Mechanical energy is conserved, because gravity is a conservative force.
机械能是守恒的，因为重力是守恒力。
General relativity views gravity not as a force but as a consequence of the curved geometry of space and time.
广义相对论并不将引力视为“力”，而是将它看作是时空弯曲的结果。
The widely celebrated discovery indicated that a mysterious and invisible form of energy is counteracting the force of gravity, pushing matter apart at an ever faster rate.
这项广受赞誉的发现显示出，一股神秘的、看不见的能量形式在和重力抗衡，以更快的速度把物质分开。
Because gravity is the only force that does work.
因为重力是，唯一作用的力。
Gran Sasso and CERN are at different distances from the center of the Earth, so the force of gravity varies slightly between the two LABS.
由于格兰·萨索与欧洲核子研究中心，这两个位置离地球中心的距离并不一样，所以这两个实验室里的重力也稍许有所差别。
She is a force of gravity in her long gray dress.
灰色长裙下的她就像一股地心引力牢牢将他吸住。
At the moment, materials like concrete, steel and aluminium wouldn't even get close because they are too heavy and the force of gravity pressing on them would eventually make them collapse.
目前，像水泥、钢铁和铝这种材料根本不能达到要求，因为它们太重，而且他们受到的重力最终会让它垮塌。
Dark energy creates a repulsive force that counters gravity and is now tearing apart space-time.
暗能量产生一种与万有引力相反的排斥力，这种排斥力推动着宇宙膨胀。
The force of gravity starts to pull together huge regions of relatively dense cosmic gas, forming the vast, swirling collections of stars we call galaxies.
引力逐渐把密集的大区域星云气体拉拢，形成那些巨大、漩涡状结构的所谓星系群。
If it waits another fraction of a second, the force of gravity will overtake inertia, causing the column to break, the liquid to fall back into the bowl, and the cat's tongue to come up empty.
如果它再等上几分之一秒，重力的作用将压倒惯性而破坏液柱，液体会落回碗里，而小猫的舌头则扑了个空。
And since a typical tower contains a full day's worth of water, the force of gravity can maintain the hydrostatic pressure of the water system even when the power goes out.
普通水塔储蓄一整天的用水，由此，即便在停电的情况下，重力作用仍能保持供水系统的静水压力。
Only now is there no acceleration so I can write down that force of Walter Lewin plus the force of gravity equals zero.
加速度才为零,写出来就是：我给它的力,与重力之合力等于零。
Revving at such massive speeds equates to an accelerative force on the pistons of nearly 9000 times gravity.
这么高速的旋转相当于在活塞上施加9000倍的重力。
It should make no difference because gravity is a conservative force.
这没有区别,因为重力恒定。
Now, gravity, well force, is equal to mass times acceleration, g and the acceleration due to gravity is g.
是重力，等于质量乘以加速度，由重力导致的加速度是。
Mg Well, we have here a force Mg; that's gravity.
这个力为，它是重力。
I said, "Gravity is really the only force that does work."
我说，“重力是唯一，起作用的力。”
During launch of the Soyuz craft, cosmonauts experience four times the force of gravity.
在联盟号发射的时候，宇航员所承受的是4倍的重力加速度。
You can sense temperature variations, proprioception (position of your muscles), and the force of gravity (you do this by knowing at what Angle your head is in while your eyes are shut).
你可以体会到温度变化，本体感受(体会到你每块肌肉的方位)和重力感(通过闭上眼睛时头部的角度来感知)。
This theory views gravity not as a force but as a consequence of the curved geometry of space and time.
这个理论把重力不是看做一种力，而是空间-时间的几何弯曲的结果。
By blowing downward these fans oppose the force of gravity, effectively lightening the vehicle.
通过向下吹风，这些风扇可以抵消引力，有效地减轻探测车的重力。
By blowing downward these fans oppose the force of gravity, effectively lightening the vehicle.
通过向下吹风，这些风扇可以抵消引力，有效地减轻探测车的重力。
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