This is called natural background radiation.
这称为自然环境辐射。
These levels of natural and background radiation is normal.
但这些都只是正常辐射。
No more background radiation black holes or Mars robots.
不要再讲关于黑洞辐射或者火星机器人的事情了。
The unwanted radiation is referred to as background radiation.
这种有害辅射称为背景辅射。
Possibly we are accustomed, biologically speaking, to this background radiation.
从生物机理上说，我们可能已经习惯了这种本底辐射。
But natural background radiation is more than 100,000 times the highest levels detected.
但其检测量大大高于自然本底辐射量一万倍。
The recent researches of cosmic X-ray background radiation are introduced in this paper.
本文介绍了宇宙X射线背景的研究近况。
But natural background radiation is more than 100, 000 times the highest levels detected.
但其检测量大大高于自然本底辐射量一万倍。
This cosmic microwave background radiation, they said, represents the ancient afterglow of the big bang.
他们说，这宇宙微波背景幅射代表着宇宙大爆炸的余辉。
The study on the target radiation characteristic is base on the study on background radiation characteristic.
背景辐射特性研究是目标辐射特性研究的基础。
Your thymus deteriorated because of the increase in background radiation caused when the two firmaments collapsed.
当两个天空倒塌时候，由于背景辐射的增加导致你们胸腺功能恶化。
It is an interesting fact that background radiation level in the power plant is lower than in the center of Moscow.
有意思的是，电厂里的本底辐射水平低于莫斯科中心的本底辐射水平。
This is called background radiation and levels vary from place to place, though the average dose is fairly constant.
辐射强度会因地点而异，但平均辐射量实则大致相同。
"Although we live bathed in a sea of background radiation, people treat any increment as a dire risk," he said by email.
“虽然我们生活在一个充满辐射的世界，但人们把任何辐射的增加当成致命的危险，”他通过电子邮件说到。
"Although we live bathed in a sea of background radiation, people treat any increment as a dire risk, " he said by email.
“虽然我们生活在一个充满辐射的世界，但人们把任何辐射的增加当成致命的危险，”他通过电子邮件说到。
The recent progress on observation and theory of the cosmic microwave background radiation(CBR) is presented in this paper.
介绍了有关宇宙微波背景辐射（CBR）观测和理论研究的最新进展。
We describe the basics of the cosmic microwave background radiation (CMB), and the physics of its anisotropy and polarization.
文章对微波背景辐射的各向异性、偏振及宇宙电离的历史给出了评述性介绍。
Altitude plays a big role, but the largest source of background radiation comes from radon gas in our homes (about 2 mSv per year).
海拔起着很大的作用，但天然辐射的最大来源，来自建筑物的氡气(每年约2毫希沃特)。
However, measurements of the cosmic microwave background radiation temperature suggest that its structure may have some systematic order.
然而，对宇宙微波背景辐射温度的测量显示宇宙的结构也许有某种系统的规律。
However, for a limited number of people living in known high background radiation areas of the world, doses can exceed 20 mSv per year.
然而对于数量不多的生活在全球已知高辐射环境地区的人们来说，每年的剂量可超过20 mSv。
And we detect this "cosmic background radiation" coming more or less evenly from all directions, forming a background beyond the stars.
从各种方向几乎完全均匀地发射，形成了所有星星的背景。
If multiple universes exist, they may collide with each other and leave behind signs in the cosmic microwave background radiation, researchers say.
研究人员说，如果存在着多重宇宙，它们可能会相互碰撞，并在宇宙微波背景的辐射里留下痕迹。
Kashlinsky and colleagues first noticed the dark flow when studying the way gas in galaxy clusters interacts with the cosmic microwave background radiation.
卡什林斯基和同事们是在研究星系团气体与宇宙微波背景辐射之间相互作用时首次注意到黑暗流的。
Radiation is harmful to living things, yet the long-term effects of persistently high levels of background radiation on ecosystems are poorly understood.
核辐射对生物有害，而长时间高水平的本底辐射对生态系统有何影响，人们还知之甚少。
The distance fromFermilab to Homestake is twice that to Soudan, and Homestake is alsotwice as deep, which means that background radiation would be extremelylow.
费米实验室到霍姆斯塔克的距离是到首丹的两倍，而霍姆斯塔克深度也是首丹的两倍，也就是说霍姆斯塔克本底辐射极为微弱。
The South Pole Telescope, which began scientific observations in 2007, surveys the sky for cosmic microwave background radiation, the "afterglow" of the Big Bang.
南极望远镜2007年开始工作。它的作用是观察宇宙微波背景辐射，这是宇宙大爆炸的“余辉”。
For most people more than half of their natural background radiation dose comes from radon, a radioactive gas that can accumulate in homes, schools and workplaces.
对大多数人来说，他们自然环境辐射剂量的一半以上来自氡—一种可聚集在家庭、学校和工作场所的放射性气体。
Radiation levels measured to date in other countries are far below the level of background radiation that most people are exposed to in every day circumstances.
其他国家迄今测量到的辐射程度，远低于大多数人每天都会受到的本底辐射水平。
Radiation levels measured to date in other countries are far below the level of background radiation that most people are exposed to in every day circumstances.
其他国家迄今测量到的辐射程度，远低于大多数人每天都会受到的本底辐射水平。
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