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单词 Radiation background
释义

Radiation background

原声例句
科学60秒 听力 2016年10月合集

But that signal is too weak. We can't see it against the universe's background radiation.

但是信号太弱了。在宇宙辐射背景下,我们根本看不到它发出的辐射。

BBC Ideas

This light is known as the cosmic microwave background radiation.

这种光被称为宇宙微波背景辐射。

VOA Special 2019年10月合集

They say he recognized the importance of the cosmic radiation background that was left over from a huge explosion billions of years ago.

他们说皮布尔斯认识到了数十亿年前一场大爆炸留下的宇宙辐射背景的重要性。

传说之境

By the time that the core was sealed away inside over 26 days worth of additional natural background radiation had already been unleashed onto the planet.

当堆芯被密封在里面时,有超过 26 天的额外自然本底辐射已经被释放到地球上。

TED演讲(视频版)双语精选

But we set off to measure the Big Bang, and we measured the map of the cosmic microwave background radiation, using millimeter waves and it's the entire sky wrapped around on to an oval so you can see it.

但我们开始衡量宇宙大爆炸,并且测量了宇宙微波背景辐射图,利用毫米波并且它是把整个宇宙包在一个椭圆里让你能看见它。

英语百科

Background radiation

The weather station outside of the Atomic Testing Museum on a hot summer day. Displayed background gamma radiation level is 9.8 μR/h (0.82 mSv/a) This is very close to the world average background radiation of 0.87 mSv/a from cosmic and terrestrial sources.
Estimate of the maximum dose of radiation received at an altitude of 12 km January 20, 2005, following a violent solar flare. The doses are expressed in microsieverts per hour.
Displays showing ambient radiation fields of 0.120-0.130 μSv/h (1.05-1.14 mSv/a) in a nuclear power plant. This reading includes natural background from cosmic and terrestrial sources.
Per capita thyroid doses in the continental United States resulting from all exposure routes from all atmospheric nuclear tests conducted at the Nevada Test Site from 1951-1962.

Background radiation is the ubiquitous ionizing radiation present in the environment. Background radiation originates from a variety of sources, both natural and artificial. Sources include cosmic radiation, naturally occurring radioactive materials such as radon, and fallout from nuclear weapons testing and nuclear accidents.

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更新时间:2025/6/19 22:29:20