Over billions of years, the gas was compressed by gravity into galaxies, stars, plants and eventually, even humans.
在数十亿年的时间里，这些气体被引力压缩成星系、恒星、植物，最终甚至变成了人类。
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。
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。
When the disk begins to coalesce into protoplanets, the gravity of those protoplanets pulls clumps of gas around the disk with them as they orbit the star.
当这个盘状物开始合并成为一组原行星时，它们的引力拉动着盘状物周围气体所凝聚的硬块，一起环绕着恒星作轨道运行。
Today (top left), for example, the gravity of the gas giant Neptune creates gaps by tugging at the icy dust and debris of the Kuiper belt, which orbits just beyond the planets.
譬如说今日的(左上图)，气体巨型星海王星的重力通过对轨道就在行星们不远处的柯伊伯带的结冰尘埃和残骸拉扯制造出数个缺口。
Since then a different planet has moved to the forefront of gas-mining plans because it lacks Jupiter's intense gravity, Saturn's gigantic rings of orbital debris and is closer than distant Neptune.
从那时起，不同的星球已经移到天然气开采计划的最前列，因为它缺乏木星的强烈引力，土星的巨大轨道碎片环并且比遥远的海王星更近。
As the lightest gas, hydrogen is the one that most easily overcomes a planet's gravity.
由于氢气是地球上最轻的气体，因此最容易挣脱地球引力。
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。
A region of gas and dust from exploding stars in the Milky Way galaxy starts to collapse under its own gravity, forming a small star surrounded by a disk of rocky material and gas.
银河系漩涡展开过程中某些区域的星群之气体尘埃在引力作用下，形成由岩石物质和气体包围的小行星。
The surface gravity, which is defined from the 1 bar pressure level in a gas giant's atmosphere, is 90 percent that of Earth's and the speed needed to reach low orbit is lowest of all the gas planets.
表面重力，这个气体巨人的大气层的气压水平限制在一巴范围，是地球的百分之90的并且需要达到的低轨道的速度是所有的气体行星的最低水平。
The stars form when gas in the cloud condenses under its own gravity and becomes packed enough to ignite nuclear fusion.
星云中的气体在它的重力下凝聚形成新星，新星变得足够满以避免核聚变。
Gravity ball check may be converted for air or gas venting by replacement of standard ball with floater PP ball.
通过用漂浮的PP球更换标准球，重力球形止回阀可以改造为适用于空气或气体排气口。
If a protoplanet was large enough, soon enough, its gravity would pull in the nebular gas, and it would become a gas giant.
如果一个原行星足够大，形成足够快，它的重力会拉入星云的气体，它就会变成一个巨型气体行星。
Is it, for instance, mostly rock and ice with a few pockets of gas, or is it a loose pile of rubble held together by gravity?
例如，是由大量的石头、冰川和少量的气体构成还是由在重力作用下聚在一起的松散的碎石堆构成。
Once the stars sputtered out, the scientists posited, the remaining gas would collapse under its own gravity into an infinitely dense point.
科学家推测，一旦这些恒星爆发完毕，剩余的气体就会在自身重力下塌缩进一个无限密集的点。
A vertical or horizontal metal separator that USES gravity to separate water, gas, and oil.
利用重力分离水、气和油的立式或卧式金属分离器。
Not only does a gross gravity separation of gas and oil occur within a reservoir but more subtle variation may also exist.
储层不仅有气和油的总重力分离出现，而且还存在更加微妙和复杂的变异。
If one lies near another star or in a gas-rich environment, the black hole's intense gravity can pull in some of this material.
如果黑洞周围存在另一颗星球或者丰富的气体环境的话，其强大的引力就会吸收这些物质。
The tail gas outlet nozzle should be tangential to allow gravity flow of the sulfur form the waste heat boiler to the inlet channel of the downstream sulfur condenser.
尾气出口喷嘴宜为正切向，从而使的来自余热锅炉硫的重力流流入下游硫冷凝器的入口通道。
Another effect of the first gas giant is that its gravity tends to fling nearby planetesimals to the outer reaches of the system, where they can form new planets.
第一个气态巨行星的另一个功效，是它的重力会把附近的微行星远远抛向系统外侧区域，让它们在该处形成新的世界。
The quantitative reservoir model and differential distribution model of oil-bearing strata have a great significance in the oil and gas exploration of gravity flow channel sediments.
这一储层定量模式及油层差异分布模式对重力流水道沉积的油气勘探和开发具有较大的指导意义。
Gravity from the larger White Dwarf slowly pulls helium from the surface of its neighbor, and the siphoned gas builds up into a shell around the star.
从较大的白矮星重力缓缓进站从邻国表面氦，而抽走瓦斯积聚成空壳了围绕恒星。
Scientists believe that a gas giant's powerful gravity tends to disrupt planetary systems, tilting the orbits of neighboring worlds.
科学家相信气体巨星的强大引力倾向于扰乱行星系统，拉斜邻近世界的轨道。
The paper introduces the features and gravity of the liquefied petroleum gas fire. It analyses comprehensively the handling of the LPG leakage and the ways of suppressing LPG fire.
本文介绍了液化石油气火灾的特点及其严重性，较全面地分析介绍了液化石油气泄漏处置和火灾扑救的方法。
In the micro gravity condition, the liquid water was removed upward by the gas phase due to the absence of gravity .
进入微重力环境后，重力消失促进了液态水在竖直流道上升段的移动。
There are all kinds of atoms out there, albeit sometimes far apart and this thin gas adds to the collective gravity budget, too!
太空中有各种各样的原子，只不过有时它们彼此相距甚远而已。即使是这样稀薄的气体也会使空间的总引力增大！
Natural gas in wellbore is a mixed gas consisting of various gas. Due to molecular weight of all kinds of gas is different, they will occur gravity segregation under the action of gravity field.
井筒内的天然气都是由多种气体组成的混和天然气，由于气体各组分的分子量不同，会在重力场作用下发生重力分异，从而使井筒内混和气体的性质与单一气体有很大差异。
Natural gas in wellbore is a mixed gas consisting of various gas. Due to molecular weight of all kinds of gas is different, they will occur gravity segregation under the action of gravity field.
井筒内的天然气都是由多种气体组成的混和天然气，由于气体各组分的分子量不同，会在重力场作用下发生重力分异，从而使井筒内混和气体的性质与单一气体有很大差异。
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