| 词汇 | background-radiation |
| 释义 | background radiation noun[ C ] physics, environment specializeduk /ˌbæk.ɡraʊnd reɪ.diˈeɪ.ʃən/ us /ˌbæk.ɡraʊnd reɪ.diˈeɪ.ʃən/ radiation found naturally on earth that comes from some soil, rocks, etc., and from outer space背景辐射（可在地球检测到的自然发生的辐射，来自外层空间以及土壤和岩石中） Physics: radiation & radioactivity alpha particle decay electromagnetic radiation gamma radiation gamma ray half-life luminosity non-ionizing non-irradiated nonradioactive post-irradiation radioisotope sievert spectrometer spectrometric spectrometry UPF UVA UVB weak force Examples of background radiationbackground radiation An ideal environment would be a place that is naturally very cold and very dry, with low air pressure and backgroundradiation. These equations are coupled to a backgroundradiation fluid, whose dynamics are determined by an acoustic wave equation. The remainder of backgroundradiation is time invariant by comparison. For alfa-emitters the backgroundradiation levels were reached after laser-based deactivation, and for beta-emitters initial activity was reduced by a factor of tens or more. This hypothetical link between cosmic radiation and epigenetic changes may only be the tip of the iceberg regarding backgroundradiation effects. If the reactor is shut down, the gamma and neutron radiation falls to natural backgroundradiation levels. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Water and seabed silt samples showed no increase in backgroundradiation levels. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 If we are to evaluate the effect of radiation doses on the population, we must compare them with naturally occurring backgroundradiation. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 These areas having high backgroundradiation might have the required rock formation and be near the coast and, therefore, attract a private nuclear installation. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Scientists believe that we are increasing the backgroundradiation in the world to the point of danger. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 I am advised that the level of natural backgroundradiation is insignificant, and that its variation is, therefore, also an insignificant factor. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Those sites have been examined and no evidence of any increase in the level of backgroundradiation has been found. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 People are known to thrive in atmospheres with high backgroundradiation. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 How about backgroundradiation or the electrical discharge one sees in storms and so on? From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The total additional radiation from testing is small compared with the backgroundradiation to which we are all subject. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 See all examples of background radiation These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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