radioactivity background 中文意思是什麼
radioactivity background
解釋
放射性本底- radioactivity : 放射活動；放射強度
- background : n 1 後景，背景；基本情況；（紡織品等的）底子；出身；經歷。2 隱蔽的[不引人注目的]地位；幕後。3 襯...
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At the surface, radioactivity of the conglomerates is locally as high as 30 x background.
在地表，礫巖的局部地段的放射性高達30倍本底值。 -
It is shown that the radioactivity level of tin polymetallic ore, undressed ore and adjacent formation is affected by the strata and mineralization type, the radioactivity level of sulfide ore is not high as a whole, while that of tin ore generally is several times higher than the background value and that of debris and slag is also relatively high, whose impact on the environment is not neglectable
錫多金屬礦原礦及圍巖放射性水平受地層與礦化類型影響很大，硫化礦整體放射性水平不高，砂錫礦卻普遍高出背景值數倍，尾礦、爐渣放射性水平也相對較高，對環境的影響不容忽視。 -
Detection of radioactivity in water with low background measuring system
對一臺立體定向伽瑪射線體部治療裝置的放射防護監測與評價
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