parasites

简明释义

英[ˈpærəsaɪts]美[ˈpærəˌsaɪts]

n. [基医]寄生虫；[生物]寄生生物（parasite 的复数）

英英释义

单词用法

同义词

反义词

例句

1.They are also better able to fend off parasites.

他们抵御寄生虫的能力更强。

2.Boiling water kills harmful bacteria and parasites.

沸水杀死有害细菌和寄生虫。

3.The parasites evolved, for example, in separate hosts.

例如寄生虫都是在不同的寄主身上进化的。

4.Artemisinin is also a promising potent drug in the treatment of cancer, human parasites such as pneumocystosis.

青蒿素还是一种有前途的有效药物，可用于治疗癌症，人类寄生虫，如肺囊虫病。

5.Malaria is caused by parasites that are transmitted by mosquitoes.

疟疾是由蚊虫传播的寄生虫导致的。

6.Parasites are usually smaller than their hosts.

寄生虫通常比它们的宿主小。

7.Natural selection favors the parasites that are best able to find and feed on hosts.

自然选择偏爱那些最容易找到寄主并以之为食的寄生虫。

8.Some parasites 寄生虫 can cause serious diseases in humans.

一些寄生虫可以在人类中引起严重疾病。

9.In biology, we study how parasites 寄生虫 affect their hosts.

在生物学中，我们研究寄生虫如何影响它们的宿主。

10.Fleas are common parasites 寄生虫 found on pets.

跳蚤是常见的宠物上的寄生虫。

11.The life cycle of many parasites 寄生虫 is complex and involves multiple hosts.

许多寄生虫的生命周期复杂，涉及多个宿主。

12.Doctors often prescribe medications to eliminate parasites 寄生虫 from the body.

医生通常会开药物来消除体内的寄生虫。

作文

In the vast realm of biology, the term parasites refers to organisms that live on or in a host organism, deriving nutrients at the host's expense. This relationship can be detrimental to the host, leading to various health issues and sometimes even death. The study of parasites is crucial for understanding ecological balance and the intricate relationships within ecosystems. There are numerous types of parasites, including protozoa, helminths, and ectoparasites such as fleas and ticks. Each type has its own unique life cycle and method of infection.One of the most well-known examples of parasites is the Plasmodium species, which causes malaria in humans. Transmitted by the bite of infected Anopheles mosquitoes, this parasite enters the bloodstream and invades red blood cells, leading to severe illness and, if untreated, can be fatal. The impact of such parasites on public health is profound, particularly in tropical regions where malaria is endemic. Efforts to control malaria have included the use of insecticide-treated bed nets, antimalarial medications, and ongoing research into vaccines.Another example is the tapeworm, a type of helminthic parasite that resides in the intestines of its host. Humans can become infected through the consumption of undercooked meat or contaminated food. Tapeworms can grow to significant lengths and may lead to nutritional deficiencies in their hosts. Education about proper food handling and cooking practices is essential in preventing infections caused by these parasites.Ectoparasites like fleas and ticks pose different challenges. These parasites live on the surface of their hosts and can transmit various diseases. For instance, ticks are known vectors for Lyme disease, which can cause severe neurological and joint problems if not treated promptly. Preventive measures include using tick repellents and performing regular checks for ticks after outdoor activities.The relationship between parasites and their hosts serves as a reminder of the delicate balance in nature. While parasites can cause harm, they also play roles in regulating populations of their hosts and contributing to biodiversity. Some researchers argue that parasites can even promote evolutionary adaptations in host species, leading to stronger and more resilient populations.In human society, the concept of parasites extends beyond biology. Metaphorically, it can refer to individuals or entities that exploit others for their gain without contributing positively in return. This notion has sparked discussions about social responsibility and ethical behavior in various contexts, from business practices to personal relationships.Understanding parasites in both biological and metaphorical senses encourages a deeper reflection on interdependence and the consequences of exploitation. As we continue to explore the complexities of life on Earth, recognizing the role of parasites—both harmful and beneficial—will enhance our knowledge of ecology, health, and societal dynamics. In conclusion, the study of parasites is not only vital for protecting public health but also offers insights into broader themes of cooperation and conflict in nature and human interactions.

在生物学的广阔领域中，术语寄生虫指的是生活在宿主生物体内或体上的生物，从宿主身上获取养分，通常会对宿主造成伤害。这种关系可能对宿主产生不利影响，导致各种健康问题，有时甚至死亡。研究寄生虫对于理解生态平衡以及生态系统内部错综复杂的关系至关重要。有许多类型的寄生虫，包括原生动物、蠕虫和外寄生虫（如跳蚤和蜱虫）。每种类型都有其独特的生命周期和感染方式。最著名的寄生虫之一是疟原虫，它导致人类疟疾。通过被感染的按蚊叮咬传播，这种寄生虫进入血液并侵入红细胞，导致严重的疾病，如果不治疗，可能致命。此类寄生虫对公共健康的影响深远，尤其是在热带地区，疟疾是地方性疾病。控制疟疾的努力包括使用杀虫剂处理的蚊帐、抗疟药物，以及正在进行的疫苗研究。另一个例子是绦虫，一种寄生在宿主肠道中的蠕虫类寄生虫。人类可以通过食用未煮熟的肉类或受污染的食物而感染。绦虫可以生长到相当大的长度，并可能导致宿主的营养缺乏。教育人们正确的食品处理和烹饪方法对于预防这些寄生虫引起的感染至关重要。外寄生虫如跳蚤和蜱虫则带来了不同的挑战。这些寄生虫生活在宿主的表面上，并可能传播各种疾病。例如，蜱虫是莱姆病的已知载体，如果不及时治疗，可能会导致严重的神经和关节问题。预防措施包括使用蜱虫驱避剂和在户外活动后定期检查蜱虫。寄生虫与宿主之间的关系提醒我们自然界的微妙平衡。虽然寄生虫可能造成伤害，但它们也在调节宿主种群和促进生物多样性方面发挥作用。一些研究人员认为，寄生虫甚至可以促进宿主物种的进化适应，使得宿主种群更强大、更具韧性。在我们的社会中，寄生虫的概念超越了生物学。从隐喻的角度来看，它可以指那些为了自己的利益而剥削他人而不做出积极贡献的个人或实体。这一概念引发了关于社会责任和道德行为的讨论，涉及到商业实践和个人关系等多个方面。理解寄生虫在生物学和隐喻意义上的含义，促使我们对相互依赖和剥削后果进行更深入的反思。随着我们继续探索地球生命的复杂性，认识到寄生虫——无论是有害的还是有益的——的作用将增强我们对生态学、健康和社会动态的理解。总之，研究寄生虫不仅对保护公共健康至关重要，而且为我们提供了对自然和人际互动中的合作与冲突的更深刻洞察。