答：从空气中或者通过雨水落下来的放射性物质可以沉积到诸如水果和蔬菜等食物的表面或动物饲料中。
Answer: Radioactive material falling from the air or carried in rain water or snow, can deposit on the surface of foods like fruits and vegetables or animal feed.
研究者通过对包裹化石的沉积层进行放射性元素年代测定，推断出中华龙鸟生活在1.25亿年前。
It lived around 125 million years ago, based on the dating of radioactive elements in the sediments that encased the fossil.
本文叙述了核设施气态流出物采样系统中气载放射性物质(放射性气体和放射性气溶胶)在采样系统管路中的沉积问题。
This paper presents an issue of the precipitation in sampling system pipeline of airborne radioactive substances, radioactive gases and aerosols, from nuclear facility effluents.
本文给出了氡子体浓度和通风、附着和沉积、以及放射性衰变之间的关系。
Mathematical relationship between Rn daughter concentrations and ventilation, adhesion and deposition, and radioactive decay was developed in the paper.
计算中考虑了静风影响及下述诸因子影响的修正：混合层，干、湿沉积，放射性衰减，建筑物影响等。
In calculation, the impact from calm and other following factors have been taken into account: mixing layer, dry and wet deposition, radioactive decay and buildings.
研究表明，低伽马泥岩是在湖泛时期由于富含放射性的钾长石和云母等矿物受到抑制而沉积形成的。
The results show that the low gamma shale were deposited in the lake-flooding stage which inhibited the deposition of minerals with high radioactivity such ask-feldspar and mica.
通过塔里木盆地不同层系沉积岩石中放射性元素铀、钍、钾的含量实测数据，计算了不同岩石的生热率。
The paper presents the heat generation rate on the bases of measurements of the contents of uranium, thorium and potassium for different types of sedimentary rock in Tarim basin.
通过塔里木盆地不同层系沉积岩石中放射性元素铀、钍、钾的含量实测数据，计算了不同岩石的生热率。
The paper presents the heat generation rate on the bases of measurements of the contents of uranium, thorium and potassium for different types of sedimentary rock in Tarim basin.
应用推荐