1. interaction of γray with matter 
   γ射线同物质的相互作用
2. The radiation, including alpha particles, nucleons, electrons, and gamma rays, emitted by a radioactive substance. 
   辐射由一种放射性物质发出的辐射，包括α粒子、原子核、电子、和γ射线
3. a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays). 
   一摄影图像由对辐射表面敏感的以辐射线而非可见的光（特别以x射线或者γ射线）拍摄生产。
4. The act or process of destroying most microorganisms in certain foods, such as fish or clam meat, by irradiating them with gamma rays or other radiation to prevent spoilage. 
   射线杀菌法破坏某种食品，如鱼或蚌肉内的大部分微生物的行为或过程，通过γ射线或其它放射线辐射的防止变质
5. Gamma-ray observations help astronomers understand the basic physics of these sources by measuring the energy and variability of the highest energy radiation coming from these sources, radiation often comes directly from the central engine. 
   通过对这些辐射源的高能辐射变化及能量的测量，γ射线的观察有助于天文学家了解这些通常直接来自能量中心的辐射源的基本物理性质。

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