Arrows would continue to fly forward forever in a straight line were it not for gravity, which brings them down to earth.
要不是重力使箭掉落地上，它将会一直沿直线往前飞行。
From the expressions on their faces, I realized the gravity of the situation.
从他们的脸部表情我晓悟到事情的严重性。
The earth's gravity slows the moon's rotation, matching it to the speed of its orbit.
地球引力减缓了月球的自转速度，使之与其轨道的速度相匹配。
As the nebula collapsed caused by its gravity, it spun faster and flattened into a disk.
当星云因其重力而坍缩时，它旋转得更快，并压扁成一个盘状。
Structures can be analyzed in terms of how they deal with downward forces created by gravity.
人们根据建筑物如何处理由重力产生的向下的力来分析它们。
Within the molten interior, under the influence of gravity, different elements were sorted out by density.
在熔体内部，在重力的影响下，（研究人员）根据密度对不同元素进行了分类。
Deformation is more likely to occur the thicker the ice is, because of the gravity of the weight of the ice.
越厚的冰越容易发生变形，是由冰的重量产生的重力造成的。
Jeanne conducted more than 200 interviews with people from organisations with potential interests in gravity studies.
珍妮对这些人进行了200多次的采访，他们来自那些可能对重力研究感兴趣的组织。
Sleeping on the front will help to prevent snoring, as the muscles of the throat will not sag backwards under gravity.
俯卧睡可以有助于防止打呼，因为这时候喉咙处的肌肉不会因为重力原因而下垂到后方。
This material gradually coalesced into lumps called planetesimals as gravity and chance smashed smaller pieces together.
随着重力和机会将较小的碎片粉碎在一起，这种物质逐渐聚集成块状，被称为天体。
An apple four hundred years ago led to the law of gravity while the apple designed by Steve Jobs has changed our life greatly.
四百年前的一个苹果带来了万有引力定律，而史蒂夫有·乔布斯设计的苹果大大地改变了我们的生活。
Without gravity to help circulate air, the carbon dioxide you exhale has a tendency to form an invisible cloud around your head.
如果没有重力帮助空气循环，你呼出的二氧化碳会在你头顶周围形成一个看不见的云状物。
The rest of the concept relied on gravity, which guaranteed that the surface of the molten metal was perfectly flat and horizontal.
其余的概念依赖于重力，它保证了熔融金属的表面是完全平坦和水平。
To counter these effects on a long-duration mission, say, Mars, astronauts will certainly need to create their own artificial gravity.
比如在火星上，为了在长期任务中对抗这些影响，宇航员肯定需要人为制造重力。
Each of the four fundamental forces (gravity, electromagnetism, and the strong and weak nuclear forces) has a kind of theoretical knob.
四种基本力（万有引力、电磁力、强核力和弱核力）中的每一种都有一个理论上的旋钮。
Most astronomers believe that the large concentration of mass at the galaxy's center is a black hole whose gravity is causing the gas to whirl.
大多数天文学家认为，星系中心的大量物质是一个黑洞，它的引力导致气体旋转。
Words like "acid", "gravity", "electricity" and "pendulum" had to be invented just to stop their meetings turning into an endless game of charades.
像“酸”，“重力”，“电”和“钟摆”这些词不得不被发明出来，只是为了防止他们的会议变成一场无止尽的字谜游戏。
On the other hand, a comparatively warm body with a small surface gravity, like Earth's moon, is unable to hold even the heaviest gas and thus lacks an atmosphere.
另一方面，像地球的卫星这种相对温暖、表面引力较小的天体，它们连最重的气体也无法容纳，因此也没有大气层。
Data collected in 1994 by the Clementine spacecraft show that many of these lunar basins have no anomalously low gravity and some even have anomalously high gravity.
1994年由克莱门蒂号航天器收集的数据显示，这些月球盆地没有异常的低重力现象，有些甚至有异常高的重力。
More importantly, scientists are already queuing for seats on these low-gravity space-flight services so they can collect data during a few minutes of weightlessness.
更重要的是，科学家们已经在排队争取这些低重力太空飞行服务的座位了，这样他们就可以在几分钟的失重状态下收集数据。
Because the surface of the water table is not flat but instead rises and falls with topography, groundwater is affected by gravity in the same fashion as surface water.
由于地下水位不是平面的，而是随着地形起伏的，所以地下水和地表水一样受到重力的影响。
Escape velocity is simply the speed of an object that's shot out of a cannon the minimum initial speed so that the object could later escape Earth's gravity on its own.
逃逸速度就是一个物体的速度，比如说，从加农炮中射出的最小初始速度，这样这个物体以后就可以自己脱离地球的引力。
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。
One thing that physiologists have learned is that without gravity our bodies begin to lose strength, leaving astronauts with weakened bones, muscles and cardiovascular systems.
生理学家发现，失去重力后身体会失去力量，这使得宇航员骨质疏松、肌肉松弛，心血管功能也相应退化。
Now, even though it may be difficult to understand how a huge mass of ice can move—or flow, it's another word for it—it's really no secret that glaciers flow because of gravity.
如今，即使想要知道一大块冰如何移动——或换个词讲，漂浮——是非常困难的，但众所周知冰川漂浮是由于重力。
He was struggling to find the right equations that would describe his new concept of gravity, ones that would define how objects move through space and how space is curved by objects.
他一直在努力寻找合适的方程来描述他的新引力概念，这些方程将定义物体如何在空间中移动，以及物体是如何扭曲空间的。
Astronomers theorize that a black hole forms when a massive object shrinks catastrophically under its own gravity, leaving only a gravitational field so strong that nothing escapes it.
天文学家的理论是，当一个巨大的物体在其自身的引力作用下灾难性地收缩，只留下一个强大的引力场，且没有任何东西能逃脱时，黑洞就形成了。
Recent studies of ancient Maya water management have found that the urban architecture of some cities was used to divert rainfall runoff into gravity-fed systems of interconnected reservoirs.
最近对古玛雅水资源管理的研究发现，一些城市的城市建筑被用来分流降雨径流到相互连接的水库的重力补给系统中。
Punishment varies according to the gravity of the offence.
处罚根据罪行的严重程度而有所不同。
Punishment varies according to the gravity of the offence.
处罚根据罪行的严重程度而有所不同。
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