Write 300 words for elementary school essay The Boat of the Future .

The ship of the future. Nowadays, there are many types of ships, including sailing ships, steamers, passenger ships, ......But I've always fantasized about the ship of the future, the City.

The city ship is like a city on the sea, with a school and a large playground where students can play games in brightly lit classrooms. And then there's the buildings, which absorb sunlight through huge glass, and then convert it into electricity through a heat exchanger, so that all the appliances, cars, street lights, billboards ......All of them can be electric, and the air on board is always fresh, free of pollution and noise. Inside the ship are restaurants, entertainment venues, hospitals, supermarkets, parks, ......Everything is available, the supporting facilities are very complete, and people's lives are very convenient.

The city ship is built so well that no matter what the danger is, even a very high tsunami, it is safe and sound, and we can live in it with peace of mind.

Nowadays, there are many types of ships, including sailing ships, steamers, passenger ships, ......But I've always fantasized about the ship of the future, the City.

The current ship is too insecure. I muttered as I watched the news, and ran into the room to design it.

I started by drawing the long decks on both sides, so that when the waves rise, the decks will automatically rise to block the waves. When it can't withstand the rough seas, the deck will shrink and the ship will turn into a fully transparent submarine, diving to the bottom of the sea to see the wonderful and strange underwater world. When the waves receded and the boat ran aground, as long as you pressed the yellow button, four wheels immediately stretched out from under the boat, and you can move freely on land.

When the boat accidentally approaches the iceberg, as long as the blue button on the boat is activated, the propeller at the tail rotates, and the boat is like a bird with wings, jumping up and flying over many obstacles. Such a ship would be perfect.

I think the exterior has been improved, but the interior has to be changed. Because the exhaust fumes emitted by the current ships during operation have seriously polluted the environment, so that some marine life is on the verge of extinction. I hope that the ship of the future will absorb sunlight, conserve energy, and can run normally even on rainy days, and the exhaust gas will have the effect of purifying the air, and the air will become exceptionally fresh after the boat is sailed, and there will be a faint fragrance on the sea.

I believe that with the development of science and technology, our dreams will definitely come true.

As we all know, the ocean occupies seven-tenths of the earth, and in 2002 the marine pollution was very serious, but in 2030, due to the development of science and technology,"Decontamination robots"It has become the nemesis of marine pollution, so there is no pollution problem in the ocean at this time.

Now, I'll take you first"Multi-purpose reception room"and sit on"Marine site changers", and it sent us to the sea world in one fell swoop.

Today's ocean is also the home of human beings, 50% of the world's people live in the ocean, you must be very curious, how do people survive in the ocean? Actually, there's one in the marine world"Oxygen control room", oxygen is made from here, and then passed"Oxygen cylinders"Transported to every corner of the ocean, people inhale fresh oxygen, expel carbon dioxide, and then by"Oxygen control room"receive, and produce oxygen ......And so on and so forth.

The fish at the bottom of the sea are even more peculiar, since the sea water became fresh water, the fish have learned to talk to people, and they can talk to people, which is interesting! When you come to a great school of fish, they say:"good morning！

The fish also speak English, which is unbelievable.

After listening to my introduction, you will go to the residential area. Although you see a desolation before your eyes, people live here. People at the bottom of the sea are not the same as people on land, they have a simple meal, one piece"Jane Shi Dan"It's a hundred days, so they're very leisurely.

What about living? Take four"Sea"For home, when I think of **sleeping**, I will sleep, carefree.

Next, you visit the palace, the park, ......It must feel magnificent and magnificent!

Maybe you are worried, so many people live on the bottom of the sea, will there be problems with the environment? No, it won't. The seabed has achieved no factory, but there is still production.

And it is by no means worse than the production of land, because we drain the garbage, sewage, and pass through the land"Decontamination robots""Pass to""Make a robot"Processing, making a variety of usable things ......

How about visiting the strange and wonderful marine world? I'm sure you will feel how amazing the power of science is.

The ocean of the future.

With the progress of science and technology and the development of the times, a new era of ocean development has arrived. In exploiting the oceans, people are more efficient at getting more wealth out of the oceans. Many countries have established seabed pastures and seabed pastures, and people are gradually transitioning from the era of simple marine fishing in the past to the era of "cultivating the sea".

People work better and more efficiently in seabed pastures and pastures than in land-based pastures, because the yield per unit of production per area of marine aquaculture is 100 times higher than that of land-based farming. People will breed seaweed and seagrass in large quantities, and ** cattle, pigs, sheep, etc. on land as feed, so as to get more protein. The total production of the world's seabed farms has jumped from 20 million tons to 50 million tons, and a large amount of seaweed and seagrass will also be harvested by underwater combine harvesters.

Not only that, but people have also built "underwater cities". A group of Japanese engineers and architects built the world's first "Ocean City" on a sea area 120 kilometers away from Tokyo. In addition to the residential area, there is also a commercial center, 400 tennis courts, 8 golf courses, 2 baseball fields, 1 artificial field for growing fruits and vegetables, and roads connecting the city.

At this time, the deep seabed will no longer be silent, and will become as lively as the mainland.

More and more people will explore the ocean, build the ocean, and use their wisdom and hands to paint this huge and incomparably grand blueprint. The future of the ocean presents a glorious future, and the vast ocean will make great contributions to humanity.

Twenty years later, the spaceship I invented, Wisdom, was born. I'll start with what it looks like. The shape of the spacecraft is oblate, like a flying saucer.

Its casing is made of a clever metal. This metal is synthesized with more than two dozen different metals, so this metal is thick. In the case there is a smart chip, and two very large magnets, one on top and one on the bottom.

There are many uses for this clever metal, first: the metal is so hard that the heat of the atmosphere is ineffective against it; Second: This metal changes color like a chameleon, so why does metal change color too?

This is the effect of more than two dozen different metals mixed together. It will change color with the temperature, space is very hot, so when the spacecraft goes into space, it slowly becomes transparent, and people in a spaceship are like walking in space; Thirdly, the metal prevents vibrations, and there are huge magnets above and below the outer shell of the spacecraft, which attract each other to keep the spacecraft balanced and people will not feel the vibrations.

Access to the cabin, there are forty seats. Oh, and why are those seats so much bigger than usual? You sit down and give it a try, get comfortable!

That's a massage chair! There is a sensor in the massager's sleepy chair, and when people sit down, the sensor will first sense which parts of people are uncomfortable, and then it will automatically massage which parts, cool! Hey, don't astronauts float?

How do you massage? That's because there's a gravitational device in the spacecraft, and this gravitational device is inside the outer shell, right under the ship. The attraction metal in the gravitational device has a special response to the human body, and it can generate enough gravitational force, so people can sit comfortably on the massage chair and massage!

In the cabin, there is an oxygen machine, which can supply oxygen to people, why is this? I'll tell you later. After visiting the cabin, go into the control cabin to have a look.

There are several robots inside, and the appearance of the robots is humanoid**, which looks not much different from real people. As long as you say what you ask for it, it will fulfill your requirements. At the front of the control cabin is the intelligent computer, which controls the spacecraft to take off and sail.

There is a weird big box next to the computer, which is the general control box of the **oxygen machine, which is used to produce oxygen. It inhales a large amount of carbon dioxide, nitrogen and other gases, then filters, converts and contributes to the impact, and finally discharges oxygen through the ** oxygen machine. Therefore, this spacecraft is a multi-functional, energy-saving, intelligent, and environmentally friendly green spaceship.

That's what my future spaceship is. How, do you want to be my first passengers in 20 years?

There are many types of ships in the future, including sailboats, ships, passenger ships, ......But I've always fantasized about the ship of the future, the City.

The city ship is like a city on the sea, with a school and a large playground where students can play games in brightly lit classrooms. And then there's the buildings, which absorb sunlight through huge glass, and then convert it into electricity through a heat exchanger, so that all the appliances, cars, street lights, billboards ......All of them can be electric, and the air on board is always fresh, free of pollution and noise. Inside the ship are restaurants, entertainment venues, hospitals, supermarkets, parks, ......Everything is available, the supporting facilities are very complete, and people's lives are very convenient.

The city ship is built so well that no matter what the danger is, even a very high tsunami, it is safe and sound, and we can live in it with peace of mind.

Nowadays, there are many types of ships, including sailing ships, steamers, passenger ships, ......But I've always fantasized about the ship of the future, the City.

Friend, you don't write well, I'm adding one, it's good to be able to go to heaven and earth.