semilethal

简明释义

英[ˌsemɪˈliːθəl]美[ˌsemaɪˈliθəl]

n. 半致死

adj. 半致死的

英英释义

单词用法

同义词

反义词

例句

1.The decline of the semilethal temperature caused by the membrane protective system is the physiological basis to improve cold resistance.

膜保护系统的适应性变化导致低温半致死温度的降低是抗寒性提高的生理基础。

2.The decline of the semilethal temperature caused by the membrane protective system is the physiological basis to improve cold resistance.

膜保护系统的适应性变化导致低温半致死温度的降低是抗寒性提高的生理基础。

3.The researchers discovered that the new pesticide was semilethal to some beneficial insects, causing a decline in their population.

研究人员发现这种新农药对一些有益昆虫是半致死的，导致它们的数量下降。

4.In the lab, the scientists tested a semilethal dose of the drug on cancer cells to determine its effectiveness.

在实验室中，科学家们对癌细胞测试了一个半致死的药物剂量，以确定其有效性。

5.Certain viruses can be semilethal, causing illness but not death in most hosts.

某些病毒可能是半致死的，在大多数宿主中引起疾病但不致死。

6.The experiment showed that the semilethal concentration of the toxin affected only a portion of the test subjects.

实验显示，毒素的半致死的浓度仅影响了一部分实验对象。

7.Some plants produce semilethal compounds to deter herbivores without completely killing them.

一些植物产生半致死的化合物，以阻止食草动物而不完全杀死它们。

作文

In the realm of biology and medicine, the term semilethal refers to a condition or agent that causes death in some individuals but not in others. This concept is particularly significant when studying diseases, toxins, or environmental factors that can have varying effects on different populations. Understanding what makes something semilethal can help researchers develop better treatments and preventive measures for diseases that affect human health. For instance, consider the impact of certain viruses that are known to be semilethal. Some people may contract the virus and experience mild symptoms, while others may face severe consequences, including death. This disparity raises important questions about genetic susceptibility, immune response, and the role of pre-existing health conditions. By investigating these factors, scientists can identify which populations are at higher risk and tailor public health interventions accordingly. Additionally, the study of semilethal agents extends beyond infectious diseases. In toxicology, researchers examine substances that can cause harm or death at certain doses. For example, certain chemicals may be semilethal to specific organisms, leading to population declines while leaving others unaffected. This phenomenon is crucial for understanding ecological balance and the potential consequences of pollution and habitat destruction. The implications of semilethal factors also reach into agriculture. Farmers often encounter pests that can be semilethal to crops. Some pesticides are designed to target these pests effectively without harming beneficial insects. However, the challenge lies in ensuring that the pesticides do not inadvertently become semilethal to non-target species, which can disrupt the ecosystem and lead to unintended consequences. Moreover, the concept of semilethal can be applied in a broader context, such as in discussions about climate change. Certain environmental changes may create conditions that are semilethal for various species. For example, rising temperatures and changing precipitation patterns can stress ecosystems, making it difficult for some species to survive while allowing others to thrive. This shift can lead to biodiversity loss and alter the dynamics of entire ecosystems. In conclusion, the term semilethal encompasses a wide range of phenomena across different fields of study. From understanding how certain diseases affect individuals differently to examining the impacts of toxins and environmental changes, the concept is vital for advancing our knowledge and improving health outcomes. As we continue to explore the complexities of life and the interactions within our environment, recognizing the significance of semilethal factors will be essential for developing effective strategies to mitigate risks and promote resilience in both human health and ecological systems.

在生物学和医学领域，术语semilethal指的是一种状态或因子，它对某些个体造成死亡，但对其他个体则没有影响。这个概念在研究疾病、毒素或环境因素时尤为重要，因为这些因素对不同人群的影响可能会有所不同。理解某种事物为何是semilethal可以帮助研究人员开发出更好的治疗方法和预防措施，以应对影响人类健康的疾病。 例如，考虑某些已知为semilethal的病毒的影响。一些人可能感染该病毒并出现轻微症状，而其他人则可能面临严重后果，包括死亡。这种差异引发了关于遗传易感性、免疫反应以及既往健康状况作用的重要问题。通过研究这些因素，科学家们可以识别出哪些人群风险更高，并相应地调整公共卫生干预措施。 此外，对semilethal因子的研究不仅限于传染病。在毒理学中，研究人员考察在特定剂量下可能造成伤害或死亡的物质。例如，某些化学品可能对特定生物是semilethal的，从而导致种群下降，而对其他生物则没有影响。这种现象对于理解生态平衡和污染及栖息地破坏的潜在后果至关重要。 semilethal因子的影响还延伸到农业。农民经常遇到可能对作物造成semilethal影响的害虫。一些农药旨在有效针对这些害虫，同时不伤害有益昆虫。然而，挑战在于确保这些农药不会无意中对非目标物种造成semilethal影响，这可能会破坏生态系统并导致意想不到的后果。 此外，semilethal的概念还可以应用于更广泛的背景，例如气候变化的讨论。某些环境变化可能会为各种物种创造出semilethal的条件。例如，气温上升和降水模式变化可能会给生态系统带来压力，使某些物种难以生存，而使其他物种繁荣。这种转变可能导致生物多样性丧失，并改变整个生态系统的动态。 总之，术语semilethal涵盖了不同研究领域中的广泛现象。从理解某些疾病如何以不同方式影响个体，到检查毒素和环境变化的影响，这一概念对于推进我们的知识和改善健康结果至关重要。随着我们继续探索生命的复杂性及其与环境的相互作用，认识到semilethal因子的意义将是制定有效策略以减轻风险和促进人类健康及生态系统韧性的关键。