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。
The brightening since 2006 could be caused by the black hole's capturing winds from an orbiting star, or by a gas cloud that spiraled into the black hole.
自2006年起的发亮可能是由于黑洞吸收了一个绕轨道而行的星星产生的风导致的，或者是由于一个气云盘旋进入了黑洞所致。
They are gaps in the sun's magnetic field which make a hole through the star's super-hot outer atmosphere — the corona — allowing gas to escape, according to a NASA description.
根据美国国家航空航天局的描述，他们是太阳磁场的缺口，太阳磁场制造了一个穿透这颗恒星外层大气的空洞—日冕，允许气体逃脱。
Most black hole mass seems to come from direct consumption (called accretion) of gas, indicating that a black hole needs a surrounding galaxy to grow.
大多数黑洞聚集物看起来是直接从气体(叫做冲击层)的消耗中间来的，这表明一个黑洞的成长需要周围有一个星系。
Active galaxies give off bright radiation from their cores, where gas heats up as it is compressed into a swirling accretion disk encircling the black hole.
活动星系从它们的核部发出明亮的光芒，在那里，气体被加热并压缩成一个漩涡状的圆盘，漩涡的中心便是黑洞。
Astrophysicists have found that when a supermassive black hole quickly devours gas and dust, it can generate enough radiation to abort all the embryonic stars in the surrounding galaxy.
天体物理学家发现，当一个巨大的黑洞快速吞噬宇宙中的气体和尘埃时产生的辐射，足够摧毁周围星系中初期形成的星体。
Aside from feasting on gas and stars, M87's champion is likely the result of aseries of black hole mergers, the last of which may have happened in the nottoo distant past.
除了吸收气体和星体，M87星系的这个宇宙质量冠军很有可能是一系列黑洞合并的结果，最近的一次可能发生在不太遥远的过去。
As the black hole feeds, the gas and dust heat up and spray out X-rays, as illustrated by the white rays.
当黑洞吞噬物质时，气体和尘埃会被加热，并喷发出x射线，在图中以白色表示。
Every now and then, the black hole swallows a bit of gas, a wayward planet, or even an entire star.
这个黑洞时不时吞下一点气体、一颗任性的行星，乃至一颗完整的恒星。
Astronomers have long thought that a black hole ought to be surrounded by a torus of dust and gas.
天文学家长期认为黑洞应该是由一环尘埃和气体包围着的。
A black hole scarfs gas like a pig at a trough.
一个黑洞被气体围绕，就好像一只被食槽环绕着的猪。
And just like the volcano here on Earth, shockwaves can be seen when the black hole pumps energetic particles into the cluster gas.
并且就像地球上的火山喷发，当黑洞向星团气体注入高能粒子时，我们可以看到冲击波。
The grayish structure surrounding the black hole, called a torus, is made up of gas and dust.
而图中环绕黑洞的灰色部分，被称为环体，它们由气体和星尘组成。
As that gas collapsed to a black hole, it pulled in more gas and dust from the disc, bulking up to a billion solar masses.
中心气体坍缩成黑洞后，会从气盘中吸入更多的气体和尘埃，达到十亿个太阳质量。
But that works only with the assumption that very special conditions were in place to prevent the gas from turning into stars before a black hole had a chance to spring to life.
但是，这个理论只有做如下假设才成立，即：在黑洞有机会形成前，其特殊条件恰好阻止气体云转变成恒星。
If a cylindrical capsule containing a suitable gas is inserted into the hole, the atoms of the gas become ionised.
如果把装有合适气体的圆柱形容器插人灯里，气体原子就会变成离子。
By emitting heat that pushes away the galactic gas, the black hole prevents any new stars from being formed.
黑洞通过释放热量将星系气体排斥掉，阻碍了任何新恒星的形成。
It consists of a dusty, doughnut-shaped cloud of gas and dust that feeds a central supermassive black hole.
它由多尘的环状气体云和不断进入中心巨型黑洞的尘埃组成。
As the gas approaches the black hole, the compression makes it glow hotter and brighter.
气体靠近黑洞时，由于受到引力的挤压，温度越来越高，同时发出愈发明亮的辉光。
Indeed, the coal boom blows yet another hole in the effort to restrain greenhouse-gas emissions.
事实上，煤炭泡沫逐步变大的同时人们正在努力限制温室气体的排放。
A portion of the gas is pulled into the black hole, but some of it is blown away.
一部分气体被拽入黑洞，但其他很多气体则被吹了出来。
This would assist the drilling of a bore hole into the mine, to take a gas reading from near where the miners are.
这将有利于向煤矿下钻孔，来读出矿工所在位置附近的气体指数。
The ring of stars saps the momentum of incoming gas, so it spirals in towards the black hole.
恒星环耗尽了引入气体的动量，所以气体就会向着黑洞盘旋地行进。
The structural parameter mainly includes the gas hole diameter, the water hole diameter and the mixture hole diameter.
结构参数方面主要包括气孔直径、水孔直径及混合孔直径。
Pay attention to their fair share of oil gas hole size, and the design of the gas points capacity.
注意气分内回油孔尺寸，还有气分的设计容积。
With the application of QC method, combined with the mathematical statistical analysis, The main factors that affect the gas hole are found.
运用QC（质量管理）方法，并结合统计分析，查找出了影响气孔的主要因素。
So often easily design overflow and air vent at inappropriate location, making casting generated gas hole.
所以常常容易因为溢流井与逃气道位置设计不当，使得铸件产生气孔的缺陷。
Gas hole and inclusion can be reduced by properly increasing thickness, and quality of the chilling layer, uniformly spraying and cleaning the mould cavity on time.
适度增加激冷层厚度，提高激冷层品质，均匀喷涂并及时清理模具型腔，可减少气孔和夹杂物缺陷。
It is significant to improve the hydraulic system for better performance of drilling rig and the higher ratio of finishing gas hole.
提高全液压坑道钻机液压系统的技术水平，对于改善钻机整机性能及提高瓦斯抽采孔的成孔率具有重要意义。
It is significant to improve the hydraulic system for better performance of drilling rig and the higher ratio of finishing gas hole.
提高全液压坑道钻机液压系统的技术水平，对于改善钻机整机性能及提高瓦斯抽采孔的成孔率具有重要意义。
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