radioactive substance

简明释义

放射性物质

英英释义

例句

1.In medical applications, radioactive substances are often used for diagnostic imaging.

在医学应用中，放射性物质通常用于诊断成像。

2.Scientists are studying the effects of radioactive substances on human health.

科学家正在研究放射性物质对人类健康的影响。

3.The radioactive substance was found leaking from the old storage facility.

放射性物质从旧储存设施泄漏出来。

4.The disposal of radioactive substance is strictly regulated to prevent environmental contamination.

对放射性物质的处理受到严格监管，以防止环境污染。

5.Workers in the nuclear power plant must wear protective gear when handling any radioactive substance.

核电站的工作人员在处理任何放射性物质时必须穿戴防护装备。

作文

The world we live in is filled with various elements, some of which are crucial for our survival while others can pose significant risks. One such category of elements is known as radioactive substances, or in Chinese, 放射性物质. These materials emit radiation as a result of the decay of their atomic nuclei. While they are often associated with nuclear energy and weapons, radioactive substances are also found in nature and have important applications in medicine, industry, and research.Radioactive substances can be naturally occurring, such as uranium and radon, or artificially produced through nuclear reactions. The process of radioactivity involves the transformation of unstable atomic nuclei into more stable forms, releasing energy in the form of radiation during this process. This radiation can take several forms, including alpha particles, beta particles, and gamma rays, each with different properties and levels of penetration.In medicine, radioactive substances are used for diagnostic imaging and treatment. For instance, in cancer therapy, radioactive isotopes can target and destroy malignant cells while minimizing damage to surrounding healthy tissue. Techniques such as positron emission tomography (PET) scans utilize radioactive substances to visualize metabolic processes in the body, allowing for early detection of diseases.Despite their beneficial uses, the handling and disposal of radioactive substances require strict regulations due to their potential health hazards. Exposure to high levels of radiation can lead to serious health issues, including cancer and genetic mutations. Therefore, it is essential for industries and medical facilities to implement safety protocols to protect workers and the public from unnecessary exposure.In addition to their medical applications, radioactive substances are also employed in various industrial processes. For example, they are used in radiography to inspect welds and structures for integrity. Furthermore, radioactive substances play a role in power generation; nuclear power plants harness the energy released from the fission of uranium atoms to produce electricity. This method of energy production is efficient and can reduce greenhouse gas emissions compared to fossil fuels, highlighting a significant advantage in the fight against climate change.However, the use of radioactive substances is not without controversy. Concerns about nuclear accidents, waste management, and the potential for proliferation of nuclear weapons have led to debates on the future of nuclear energy. The catastrophic events at Chernobyl and Fukushima serve as stark reminders of the dangers associated with nuclear technology. As a result, many countries are re-evaluating their reliance on nuclear power and seeking alternative energy sources.In conclusion, radioactive substances are a double-edged sword that offers both remarkable benefits and significant risks. Their applications in medicine and industry demonstrate their value, yet the potential dangers they pose cannot be ignored. As society continues to advance technologically, it is vital to balance the use of radioactive substances with appropriate safety measures and ethical considerations. Education and awareness about these materials will empower individuals to make informed decisions regarding their use and help mitigate the risks associated with radiation exposure.

我们生活的世界充满了各种元素，其中一些对我们的生存至关重要，而另一些则可能带来重大风险。这样一个元素类别被称为放射性物质，这些材料由于其原子核的衰变而发出辐射。虽然它们通常与核能和武器相关联，但放射性物质在自然界中也存在，并在医学、工业和研究中具有重要应用。放射性物质可以是自然存在的，如铀和氡，也可以通过核反应人工产生。放射性过程涉及不稳定原子核转变为更稳定形式，在此过程中释放能量以辐射的形式。这种辐射可以有多种形式，包括α粒子、β粒子和γ射线，每种形式具有不同的特性和穿透能力。在医学中，放射性物质用于诊断成像和治疗。例如，在癌症治疗中，放射性同位素可以靶向并摧毁恶性细胞，同时尽量减少对周围健康组织的损害。正电子发射断层扫描（PET）利用放射性物质可视化体内的新陈代谢过程，从而实现疾病的早期检测。尽管有益的用途，但由于潜在的健康危害，处理和处置放射性物质需要严格的法规。接触高水平辐射可能导致严重的健康问题，包括癌症和基因突变。因此，工业和医疗设施必须实施安全协议，以保护工人和公众免受不必要的暴露。除了医学应用外，放射性物质还用于各种工业过程。例如，它们用于射线照相检查焊缝和结构的完整性。此外，放射性物质在发电中也发挥着作用；核电站利用铀原子裂变释放的能量来生产电力。这种能源生产方法高效，并且与化石燃料相比可以减少温室气体排放，突显了在应对气候变化方面的重要优势。然而，使用放射性物质并非没有争议。关于核事故、废物管理以及核武器扩散的潜在风险引发了对核能未来的辩论。切尔诺贝利和福岛的灾难性事件提醒我们与核技术相关的危险。因此，许多国家正在重新评估对核电的依赖，并寻求替代能源。总之，放射性物质是一把双刃剑，既提供了显著的好处，也带来了重大风险。它们在医学和工业中的应用展示了其价值，但其潜在危险不容忽视。随着社会的技术不断进步，平衡使用放射性物质与适当的安全措施和伦理考量至关重要。对这些材料的教育和意识将使个人能够做出明智的决策，并帮助减轻与辐射暴露相关的风险。