Chapter-3 | Health: The Ultimate Treasure | Class 8 Science Curiosity | Animation Video · NEW AGE Golden School Books
本视频讲解健康的重要性及多方面构成，涵盖身体健康、心理健康和社会健康。适合练习健康相关词汇和表达，了解疾病分类与预防方法。
Good morning, ma 'am.
早上好，女士。
Dear students, in today's class, we will discuss about health, which is the most precious treasure we all want to get.
亲爱的同学们，在今天的课堂上，我们将讨论健康这个话题。健康是我们所有人都渴望拥有的最珍贵的财富。
But we find it difficult to possess all the times.
但我们发现很难始终都做到这一点（即始终拥有某样东西或保持某种状态）。
Ma 'am is only not falling sick called health, or does health mean more than that?
如果一个人没有生病，我们就认为他很健康；但“健康”这个词的含义真的仅仅局限于此吗？
Health constitutes more than just not falling sick.
健康不仅仅意味着不生病。
It has physical, mental and social aspects.
它涉及身体、心理和社会等多个方面。
A person is called healthy when he is physically fit, mentally sound with positive mindset and has strong relationships with the members of society.
当一个人身体健康、精神状态良好、心态积极，并且与社会中的其他成员保持着良好的关系时，我们就称他为“健康的人”。
Ma 'am, how can we stay healthy?
妈妈，我们该如何保持健康呢？
We can stay healthy by eating nutritious food, living in clean environment with low AQI and doing exercise regularly.
我们可以通过食用营养丰富的食物、生活在空气质量良好的清洁环境中以及定期锻炼来保持健康。
What is AQI?
什么是AQI（空气质量指数）？
Air Quality Index measures the cleanliness of air.
空气质量指数用于衡量空气的清洁程度。
Low AQI below 100 means more clean air as compared to higher AQI.
空气质量指数（AQI）低于100表示空气更加清洁；相比之下，较高的AQI值意味着空气质量较差。
Ma 'am, how do we know about our being unhealthy?
女士，我们怎么才能知道自己是否处于不健康的状态呢？
We develop certain symptoms like pain, dizziness or tiredness, and some signs such as rash,
我们会出现某些症状，比如疼痛、头晕或疲劳，以及一些体征，例如皮疹。
fever, high blood pressure or swelling when we are unwell.
当我们身体不适时，可能会出现发烧、高血压或肿胀等症状。
Ma 'am, what are the causes and types of diseases?
女士，疾病的原因和类型有哪些呢？
Pathogens like bacteria, fungi, viruses, worms or protozoa are the causes of diseases.
细菌、真菌、病毒、蠕虫或原生动物等病原体是导致疾病的原因。
There are two types of diseases namely non -communicable diseases and communicable diseases.
疾病可以分为两种类型：非传染性疾病和传染性疾病。
What are non -communicable diseases and communicable diseases?
什么是非传染性疾病和传染性疾病？
Non -communicable diseases don't spread from one person to another.
非传染性疾病不会在人与人之间传播。
And they are caused because of environment, diet and personal lifestyle like cancer,
这些疾病的发生与环境、饮食以及个人生活方式密切相关，例如癌症。
asthma and diabetes.
哮喘和糖尿病。
Dear students, on the other hand communicable
亲爱的同学们，另一方面，传染病……
diseases spread from one person to another and are caused by pathogens or germs like when you sneeze germs pass to another person,
疾病会在人与人之间传播，其根源是病原体或细菌。例如，当你打喷嚏时，细菌就会传播到另一个人身上。
for example COVID -19.
例如，COVID-19。
How do communicable diseases infect us?
传染病是如何传染给我们的？
We get infected by communicable diseases due to polluted air, contaminated food or water.
我们之所以会感染传染病，是因为空气受到污染，或者食物或水源被污染了。
They also spread through sneezing, coughing or contact with infected person.
它们还可以通过打喷嚏、咳嗽或与感染者接触等方式传播。
Mosquitoes, houseflies and parasites are also the causes of communicable diseases.
蚊子、家蝇以及各种寄生虫也是传染病的传播源。
Ma 'am, please tell us the causes of non -communicable diseases.
女士，请告诉我们非传染性疾病的原因。
Non -communicable diseases are caused due to diet, lifestyle and or environment.
非传染性疾病是由饮食、生活方式或环境因素引起的。
How many types of non -communicable diseases are there?
非传染性疾病有多少种？
There are two types of non -communicable diseases, namely deficiency diseases and chronic diseases.
非传染性疾病分为两类：营养缺乏性疾病和慢性疾病。
Deficiency diseases are due to lack of nutrients in our diets, like eating junk foods.
营养缺乏症是由于饮食中缺乏某些营养物质引起的，比如经常食用垃圾食品。
While chronic diseases are due to our lifestyles or environment, such as irregular or insufficient sleep or unclean surroundings.
虽然慢性疾病的成因与我们的生活方式或所处的环境有关（例如睡眠不规律或睡眠不足，以及生活环境不卫生），但这些因素本身也是由不良生活习惯或外部环境因素长期累积导致的。
Ma 'am, what are the ways of preventing and controlling diseases?
女士，预防和控制疾病的方法有哪些呢？
We can prevent and control diseases if our body has ability to fight diseases.
如果我们的身体具备抵抗疾病的能力，我们就能够预防和控制各种疾病。
How can we enable our body to have disease fighting ability?
我们该如何让身体具备抵抗疾病的能力呢？
If we have natural immunity that comes through nutritious diet, our body can fight diseases.
如果我们通过营养丰富的饮食获得天然的免疫力，那么我们的身体就能够抵抗疾病。
In addition, vaccination that gives us acquired immunity also protects us from certain diseases, like polio,
此外，能够让我们获得免疫力的疫苗接种还能保护我们免受某些疾病的侵害，比如脊髓灰质炎。