1. The field of radioecology examines the effects of radioactive substances on the environment.
(辐射生态学的研究领域主要是研究放射性物质对环境的影响。)
2. Radioecology plays a crucial role in assessing and managing the environmental impact of nuclear accidents.
(辐射生态学在评估和管理核事故的环境影响方面发挥着至关重要的作用。)