bacteria

简明释义

英[bækˈtɪəriə]美[bækˈtɪriə]

n. 细菌（bacterium的复数）

英英释义

单词用法

同义词

反义词

例句

1.Chlorine is added to kill bacteria.

加入氯以杀菌。

2.But the chance of these bacteria being on most surfaces is very low.

但是，这些细菌出现在大多数表面上的几率非常低。

3.And bacteria, primitive forms of life, have been seen there.

细菌——一种原始的生命形式——在那里被发现。

4.But how many bacteria actually transfer in five seconds?

但是有多少细菌能在五秒钟内转移呢？

5.Different types of bacteria existed on public-toilet floors.

公共厕所的地板上有不同类型的细菌。

6.It is possible to multiply these bacteria in the laboratory.

在实验室里繁殖这些细菌是可能的。

7.The bacteria are harmless to humans.

这些细菌对人无害。

8.There were more bacteria on sidewalks than in the home.

人行道上的细菌比家里的要多。

9.Bacteria are everywhere.

细菌无处不在。

10.Some bacteria are beneficial and help in digestion.

一些细菌是有益的，帮助消化。

11.Food can spoil quickly if it is contaminated with bacteria.

如果食物被细菌污染，可能会很快变质。

12.Certain types of bacteria are used in yogurt production.

某些类型的细菌用于酸奶生产。

13.The presence of bacteria in the water can lead to serious health issues.

水中存在的细菌可能会导致严重的健康问题。

14.Antibiotics can kill harmful bacteria but may also affect good ones.

抗生素可以杀死有害的细菌，但也可能影响有益的细菌。

作文

Bacteria are microscopic organisms that exist all around us, in the air, soil, and even inside our bodies. They belong to a group of single-celled organisms and are classified as prokaryotes, which means they lack a true nucleus. Understanding the role of bacteria（细菌） is crucial because they play a significant part in various ecosystems and have both beneficial and harmful effects on human health. Firstly, many types of bacteria（细菌） are essential for our survival. For example, the human gut is home to trillions of bacteria（细菌）, known as gut microbiota, which aid in digestion and help synthesize vitamins that our body cannot produce on its own. These friendly bacteria（细菌） also protect us from harmful pathogens by outcompeting them for resources and space. This symbiotic relationship is vital for maintaining a healthy digestive system and overall well-being.In addition to their role in human health, bacteria（细菌） are also crucial in various environmental processes. They are involved in nutrient cycling, such as the nitrogen cycle, where certain types of bacteria（细菌） convert atmospheric nitrogen into forms that plants can absorb. This process is essential for plant growth and, consequently, for the food chain. Moreover, bacteria（细菌） play a significant role in decomposing organic matter, recycling nutrients back into the ecosystem and helping to maintain soil health.However, not all bacteria（细菌） are beneficial. Some can cause diseases in humans, animals, and plants. Pathogenic bacteria（细菌） are responsible for numerous infections and illnesses, ranging from mild ailments like strep throat to severe diseases such as tuberculosis or cholera. The emergence of antibiotic-resistant strains of bacteria（细菌） has become a global health concern, making it increasingly difficult to treat common infections. This highlights the importance of understanding bacteria（细菌） and their behavior, as well as the need for responsible use of antibiotics.The study of bacteria（细菌） is an ever-evolving field that continues to reveal new insights into their complexity and diversity. Advances in technology, such as DNA sequencing, have allowed scientists to explore the vast array of bacteria（细菌） species that exist, many of which have yet to be discovered or understood. This research not only enhances our knowledge of microbial life but also opens up possibilities for new medical treatments, bioremediation techniques, and sustainable agricultural practices.In conclusion, bacteria（细菌） are a fundamental component of life on Earth, influencing health, environment, and industry. While some bacteria（细菌） can be harmful, the majority are beneficial and necessary for various biological processes. As we continue to learn more about these microorganisms, it becomes increasingly clear that they are integral to our existence. Recognizing the importance of bacteria（细菌） can lead to better health outcomes, improved environmental sustainability, and innovative solutions to challenges we face today.

细菌是微观生物，存在于我们周围的空气、土壤，甚至我们身体内部。它们属于单细胞生物的一类，被归类为原核生物，这意味着它们缺乏真正的细胞核。理解bacteria（细菌）的作用至关重要，因为它们在各种生态系统中扮演着重要角色，并对人类健康产生了有益和有害的影响。首先，许多类型的bacteria（细菌）对我们的生存至关重要。例如，人类肠道内居住着数万亿个bacteria（细菌），被称为肠道微生物群，它们帮助消化并合成我们身体无法自行产生的维生素。这些友好的bacteria（细菌）还通过争夺资源和空间来保护我们免受有害病原体的侵害。这种共生关系对于维持健康的消化系统和整体健康至关重要。除了在人类健康中的作用外，bacteria（细菌）在各种环境过程中也至关重要。它们参与营养循环，例如氮循环，其中某些类型的bacteria（细菌）将大气中的氮转化为植物可以吸收的形式。这个过程对植物生长至关重要，因此对食物链也至关重要。此外，bacteria（细菌）在分解有机物方面发挥着重要作用，将养分回收进入生态系统，并帮助维持土壤健康。然而，并非所有的bacteria（细菌）都是有益的。有些可能会在人类、动物和植物中引起疾病。致病性bacteria（细菌）负责引起许多感染和疾病，从轻微的病症如咽喉炎到严重的疾病如肺结核或霍乱。抗生素耐药菌株的出现已成为全球健康问题，使得治疗常见感染变得越来越困难。这突显了理解bacteria（细菌）及其行为的重要性，以及负责任地使用抗生素的必要性。对bacteria（细菌）的研究是一个不断发展的领域，继续揭示它们的复杂性和多样性。技术的进步，如DNA测序，使科学家能够探索存在的各种bacteria（细菌）物种，其中许多尚未被发现或理解。这项研究不仅增强了我们对微生物生命的认识，还为新的医疗治疗、生物修复技术和可持续农业实践开辟了可能性。总之，bacteria（细菌）是地球生命的基本组成部分，影响健康、环境和工业。虽然一些bacteria（细菌）可能有害，但大多数是有益的，并且对各种生物过程是必要的。随着我们对这些微生物的了解不断加深，越来越清楚的是，它们对我们的生存至关重要。认识到bacteria（细菌）的重要性可以带来更好的健康结果、改善环境可持续性以及应对我们今天面临的挑战的创新解决方案。