The highenergyradiation mechanism research of active galactic nuclei is a key to understanding their structure, evolution features and origin of central drive.
活动星系核的高能辐射机制研究对于揭示其结构和演化特征以及中央驱动之谜具有极其重要的意义。
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Space also has high levels of radiation, energy that can pass through our bodies and make us sick.
太空也有高等级的辐射，其能量可以穿过我们的身体，让我们生病。
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The supernova explosions that create and spread heavy elements also unleash a torrent of high-energyradiation: gamma rays, X-rays, and ultraviolet light.