What are the three parts of the dust journey?

The first paragraph (1) dust is annoying, but humans can't live without it.

The second section (2) is a small amount of dust from soil and rocks.

In the third section (vv. 3-6), dust plays a great role.

The action of dust in the fourth paragraph (7) tells us that there are two sides to everything.

In this article, we are introduced to the lesser-known side of dust. Human beings are inseparable from dust, and the author reveals a profound philosophy: things often have two sides, and only by correctly understanding them can we pursue the advantages and disadvantages and benefit mankind.

In the eyes of people, dust is often the main culprit for polluting the environment, spreading germs, and endangering human health. However, this text introduces us to a lesser-known side of dust: it is inseparable from the dust that human beings live in.

If there is no dust in the atmosphere, strong sunlight will make it impossible to open one's eyes; If there were no dust in the atmosphere, the sky would be white; If there were no dust in the air, everything on the ground would be wet, and more seriously, there would be less and less water on the earth, and eventually it would dry up completely, and living things would not be able to survive. In addition, without dust, nature would be very monotonous. It is through the action of dust that the author reveals a profound philosophy:

Things often have two sides, and only by correctly understanding them can we pursue advantages and avoid disadvantages and benefit mankind.

The whole text is well-structured and well-organized. The language is accurate, vivid, knowledgeable and interesting. The authors use hypotheses, column figures, comparisons, and other methods of explanation.

It clearly and vividly illustrates the important relationship between dust and human beings.

Journey of the Dust consists of the following three parts:

1.Traveling in the Universe: This section tells how dust floats, moves, and travels through the universe, and the effects they have on the stars and matter in the universe.

2.Travel on Earth: This section tells how dust lands on Earth, is deposited, and their impact on weathering, climate, and ecosystems on the Earth's surface.

3.Impact on human life: This section describes the impact of dust on human life, including air quality, health issues, cultural heritage, and more.

The above is the main content of "The Journey of Dust", through the introduction of these three parts, readers can have a comprehensive understanding of the movement of dust in the universe and on the earth and the impact on human life.

1 is loved and hated 2 from **3 introduced.

What are the three sections of the dust travel:The first part is the autobiography of the fungus. This part has been written in the first person by the fungus, and the full text writes how the fungus defeats the human body step by step:

Slipping from the respiratory tract into the lungs, and then from the lungs to the breast peak, leaving the breast peak and sliding near the esophagus, and excreting from the intestinal cavity, the journey is over, but if it wins by chance, one side will dominate! What I liked the most was his experience at the breast peak: it was the first bacteria to come to the mouth of a newborn, and he was lonely in this body, without his siblings, with no one to fight with him.

There is one place he describes very specifically: climbing in from the nipple peak, there is a shrunken empty sac, where breast milk can be produced, and it is very fond of breast milk, because there are small milk balls and many treasures.

Part II, Bacteria and Humans. In this part, my favorite part is the clear water and turbid water, which made me understand a lot of knowledge that I don't usually know, such as: the river water has the most bacteria, because it has its own water bacteria, and the bacteria in the land, and the groundwater bacteria are the least, I also know that the lake water has fewer bacteria than the river water, although the water in the lake looks green and dirty, but it is cleaner compared to the river water!

How amazing, and because of the development of science and technology, a kind of sterile water is also used in chemical work, which is the purest water now. But this is very difficult to make, very precious and rare, so it is not often seen in daily life.

The third part of the immortal spirit of the cell, in this part, my favorite is the paragraph about coarse grains and fine grains, the article tells us that coarse grains are more nutritious than fine grains in the way of questions and answers, and they will be more delicious than fine grains under a little processing, easier to digest, and the price of coarse grains is lower than fine grains, which saves a little food money can buy non-staple foods (vegetables and meat) so that you can supplement more nutrients. The article also tells us which vitamins are deficient in the body and which symptoms are prone to, it seems that vitamin supplementation is a very important thing!

Natural dust: Some are debris from mountain rocks, some are dry soil from fields, some are salt powder from the sea surface from the evaporation of waves, some are volcanic ash, and some are cosmic dust from interstellar space. These are natural dusts.

Man-made dust: mainly dust from chimneys, in addition to cement factories, metallurgical plants, chemical plants, ceramic factories, textile mills, flour mills, lime kilns, etc., these are all places where dust is manufactured. There are also some dust that comes from plant homes, such as pollen, cotton wool, catkins, seeds, etc.; Some come from animal homes, such as feces, bird feathers, insect eggs, etc.

Went to the fields and mountains, over the ocean, to the city streets.

The central idea of "Dust Travel":

The Journey of the Dust Part 3: Think Like a Mountain, Fly Faster Than Sound, Tomorrow's Sun City. It mainly talks about environmental protection, high-tech and imagination of future science and technology.

This book not only inspires young readers to examine the natural environment and advocate environmental protection, but also stimulates young people's interest and confidence in future exploration, which is very educational.

Dusty trips go outdoors, indoors in the suburbs of cities, flatlands, mountains, deserts, oceans.

The book is a collection of Chinese and foreign popular science works, and contains knowledge in the beautiful stories, with moderate length, beautiful words, vivid and interesting. It is an interesting, aesthetic and intelligent book to help children discover the beauty of science through reading, which can better satisfy children's curiosity and curiosity, as well as the imagination of beautiful words.

This book mainly talks about environmental protection, high-tech and imagination of future science and technology, inspires children to examine nature, advocates environmental protection, and stimulates children's interest and confidence in future exploration.

Dust Travels clip:

Dust is the never-tireless traveler on Earth, and it drifts with the turbulence of the air.

The air around us, from indoor to outdoor, from the city to the countryside, from the flat land to the mountains, from the desert to the ocean, has its whereabouts almost everywhere. A truly dust-free space can only be made in a laboratory.

Under a clear sky, the dust is invisible, and only when the sun's rays shine through the cracks in the blinds into the dark room, countless dusts can be clearly seen floating in the air. Large dust can be seen with the naked eye, but small dust is smaller than bacteria, and even ...... cannot be observed with a microscope

The Journey of the Dust is a collection of works by the famous popular science writer Gao Shiqi. The book is divided into three parts: science talks, science sketches and science fairy tales, which use easy-to-understand language to explain the profound scientific knowledge vividly and clearly, completely remove the veil of scientific mystery, and lead young people to easily enter the magical world of science.

This book is about dust that fills all the spaces around us and can only be seen when sunlight shines into a dark room. The amount of dust varies from place to place. Dust also has a significant impact on meteorological changes.

There are many, many dusty ones, and they may be natural or urban. Dust can also induce disease. Nowadays, people are trying to make dust good for the benefit of mankind.

The reason why this text is written vividly and interestingly is mainly because it uses metaphors, and it is used vividly. The first manifestation of life is that there is a change in the metaphor. In the space of the earth, dust drifts with the air and is everywhere, and the article compares it to the "never-tiring traveler". ”