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- natural background radiation 天然本底辐射
- The unwanted radiation is referred to as background radiation. 这种有害辅射称为背景辅射。
- The Estimation of Doses to the Inhabitants Arising from Natural Radiation Source in the High Background Radiation Area of Yangjiang, China. 天然辐射源致阳江高本底辐射地区居民的剂量估算。
- Title: The Estimation of Doses to the Inhabitants Arising from Natural Radiation Source in the High Background Radiation Area of Yangjiang, China. 关键词:天然辐射源;高本底辐射地区;剂量估算;有效剂量;吸收剂量
- Image of the cosmic microwave background radiation (CMBR). 宇宙微波背景辐射。
- We believe this background radiation was generated when the universe was very young. 我们相信它们是宇宙初开后所残留的辐射。
- The results show that the radioactivity level of varied water bod-ies of the city was within normal natural background. 调查结果表明,上海市各类水体中天然放射性核素浓度属正常本底水平。
- For their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation. 大意是因为他们发现了宇宙微波背景辐射的黑体形式和各向异性。
- Recent advances in epidemiological investigation in the high background radiation area of Yangjiang, China. 阳江高天然放射性本底地区流行病学研究近况。
- The enhanced sensitivity of this detector requires that it be used in areas with low levels of background radiation. 这种探测器有更高的敏感度,因而要求它用于背景辐射水平低的地区。
- The results show that the radioactivity level of variedwater bodies of the province was within normal natural background. 调查结果表明,全区绝大部分水体中天然放射性核素浓度属正常本底水平,个别水样核素浓度偏高。
- They had found the cool afterglow of the big bang: the cosmic microwave background radiation. 他们发现的是大霹雳冷却后的馀晖:宇宙微波背景辐射。
- Those of us who study the background radiation focus our attention precisely on what our colleagues try to ignore. 我们这些研究背景辐射的人,就是专门将大把精力放在同行想要忽略的东西上。
- There are 575 deluxe rooms of various styles in the 550 mu tropic plants garden of the hotel, preparing amazing natural background for this picture-like resort. 酒店现有575间风格迥异的豪华客房点缀于550亩的热带植物花园中,为这一风景如画的仙游圣地平铺了靓丽的天然底色。
- Model of the power spectrum of the cosmic microwave background radiation (CMBR) by Prof M. 宇宙微波背景辐射功率谱模型。
- On the whole, cities enjoyed good acoustic environment and radioactivity pollution maintained at natural background level. The total amount of arable land was on decline. 城市声环境质量较好,辐射环境质量基本维持在天然本底水平。
- When natural background sounds, like the engine tickover of a parked car, were added, the hybrids' direction sometimes could not be detected until they were perilously close. 如果添加诸如停车时发动机的空转此类自然背景音,有时混合型汽车的方向在危险距离之前根本无从判断。
- To measure background radiation, we need subtle instruments; to measure beauty, we need alert intelligence and our five keen senses. 测量背景辐射,我们需要精密仪器;而衡量美,则需要动用我们的聪慧和所有敏锐的感官。
- The hot reference is usually a blackbody under environmental temperature,and the cold reference is Cosmic Background Radiation. 其中高温定标源采用处在环境温度下的黑体,低温定标源为冷空背景辐射。
- Objective To examine the pulmonary tuberculosis mortality risk of the residents in high background radiation area (HBRA), Yangjiang, China. 目的探讨天然放射性高本底地区居民肺结核死亡危险。