radioactive substance

简明释义

放射性物质

英英释义

例句

1.The handling of radioactive substance is strictly regulated in laboratories.

实验室中对放射性物质的处理是严格受监管的。

2.Workers must wear protective gear when dealing with radioactive substance.

工人在处理放射性物质时必须穿戴防护装备。

3.In some medical treatments, a radioactive substance is used to target cancer cells.

在某些医疗治疗中，使用放射性物质来靶向癌细胞。

4.A radioactive substance can pose significant health risks if not managed properly.

放射性物质如果管理不当，可能会对健康造成重大风险。

5.The disposal of radioactive substance requires special procedures to ensure safety.

放射性物质的处置需要特殊程序以确保安全。

作文

Radioactive substances are materials that emit radiation as a result of the decay of their atomic nuclei. These substances can be found in nature, such as uranium and radon, or they can be man-made, like certain isotopes used in medical applications. The term 'radioactive substance' refers specifically to any material that contains unstable atoms that lose energy by emitting radiation in the form of particles or electromagnetic waves. This process is known as radioactivity. Understanding the properties and behaviors of radioactive substances is crucial for various fields, including medicine, nuclear energy, and environmental science.In medicine, radioactive substances play a significant role in diagnostic imaging and treatment. For example, radioactive isotopes are used in procedures like PET scans, where they help doctors visualize how organs and tissues are functioning. The use of these materials allows for early detection of diseases, including cancer. However, the use of radioactive substances also raises concerns about safety and exposure to radiation. Therefore, strict regulations and guidelines are established to ensure that medical professionals handle these materials safely.In the field of nuclear energy, radioactive substances are essential for generating power. Nuclear reactors utilize uranium or plutonium as fuel, which undergoes fission, releasing a tremendous amount of energy. This energy is harnessed to produce electricity. While nuclear energy is a powerful source of electricity, it also presents challenges, particularly regarding the management of nuclear waste, which consists of radioactive substances that remain hazardous for thousands of years. Proper disposal and containment methods are critical to prevent environmental contamination.Environmental scientists study radioactive substances to understand their impact on ecosystems and human health. Natural occurrences of radioactive substances, like radon gas, can accumulate in homes and pose health risks to residents. Monitoring and mitigating exposure to these naturally occurring radioactive substances is vital for public health initiatives. Furthermore, understanding the behavior and movement of radioactive substances in the environment helps in assessing the risks associated with nuclear accidents, such as the Chernobyl disaster or the Fukushima Daiichi incident.Despite their potential dangers, radioactive substances also have beneficial applications. In agriculture, for instance, they can be used to improve crop yields through techniques like mutation breeding. By exposing seeds to radiation, scientists can create new plant varieties that are more resilient to pests and diseases. This innovative approach demonstrates that while radioactive substances can be harmful, they can also contribute positively to food security and agricultural sustainability.In conclusion, radioactive substances are a complex topic that encompasses both risks and benefits. Their unique properties make them valuable in various fields, from medicine to energy production. However, the potential hazards associated with their use require careful management and regulation. As our understanding of radioactive substances continues to evolve, it is essential to balance their advantages against their risks to ensure a safer future for all. By educating ourselves about radioactive substances and their effects, we can make informed decisions that protect our health and environment.

放射性物质是指由于其原子核的衰变而发出辐射的材料。这些物质可以在自然界中找到，例如铀和氡，或者是人造的，如在医学应用中使用的某些同位素。术语“放射性物质”特指任何含有不稳定原子的材料，这些原子通过以粒子或电磁波的形式发射辐射来释放能量。这一过程被称为放射性。理解放射性物质的性质和行为对于包括医学、核能和环境科学在内的多个领域至关重要。在医学中，放射性物质在诊断成像和治疗中发挥着重要作用。例如，放射性同位素用于PET扫描等程序，帮助医生可视化器官和组织的功能。这些材料的使用使得早期发现疾病（包括癌症）成为可能。然而，放射性物质的使用也引发了关于安全性和辐射暴露的担忧。因此，制定了严格的法规和指导方针，以确保医疗专业人员安全地处理这些材料。在核能领域，放射性物质对发电至关重要。核反应堆利用铀或钚作为燃料，这些燃料通过裂变释放出巨大的能量。这种能量被用来生产电力。虽然核能是强大的电力来源，但它也带来了挑战，特别是在核废料的管理方面，核废料由放射性物质组成，这些物质在数千年内仍然具有危险性。妥善处置和封存方法对于防止环境污染至关重要。环境科学家研究放射性物质以了解其对生态系统和人类健康的影响。自然发生的放射性物质，如氡气，可能在家庭中积聚，对居民构成健康风险。监测和减轻对这些自然发生的放射性物质的暴露对于公共健康倡议至关重要。此外，了解放射性物质在环境中的行为和运动有助于评估与核事故相关的风险，例如切尔诺贝利灾难或福岛第一核电站事件。尽管存在潜在危险，放射性物质也有其有益的应用。例如，在农业中，它们可以通过突变育种技术来提高作物产量。通过将种子暴露于辐射下，科学家可以创造出更能抵御害虫和疾病的新植物品种。这种创新的方法表明，虽然放射性物质可能是有害的，但它们也可以积极促进食品安全和农业可持续性。总之，放射性物质是一个复杂的话题，涵盖了风险和利益。它们独特的性质使其在医学、能源生产等多个领域具有价值。然而，与其使用相关的潜在危害需要谨慎管理和监管。随着我们对放射性物质理解的不断发展，必须平衡其优势与风险，以确保所有人的安全未来。通过教育自己了解放射性物质及其影响，我们可以做出明智的决定，保护我们的健康和环境。