Enjoy an English essay every day.

English composition is rich in themes and covers a wide range, and most of them contain philosophy of life. Guiding students to appreciate American literature can not only improve their reading comprehension, but also edify them with beauty, thus improving their understanding of the surrounding things. The following is an English essay that I bring to enjoy every day. Welcome to read!

Enjoy an English essay every day.

The evolution of sleep

The evolution of sleep

Sleep is very old. From the EEG point of view, we have this phenomenon with all primates and almost all other mammals and birds: it can be traced back to reptiles.

Sleep has existed since ancient times. According to EEG, we humans need sleep as much as all primates and almost all mammals and birds. Even reptiles have sleep.

There is some evidence that the two types of sleep, dreamy and dreamless, depend on the lifestyle of animals. Statistically, carnivores are more likely to dream than prey, and prey is more likely to experience dreamless sleep. In the dream, animals are strongly fixed and have no obvious response to external stimuli. Dreamless sleep is much shallower, and we have all seen cats or dogs pricking up their ears to listen to sounds when they are obviously asleep.

There is evidence that dreamless sleep and dreamless sleep depend on the lifestyle of animals. According to statistics, carnivores have more dreamy sleep than prey, while prey has more dreamless sleep. When animals sleep in their dreams, they are actually disabled and lack of response to external stimuli. Dreamless sleep is much shallower. We have all seen cats and dogs stand up at the slightest sound when they are obviously in deep sleep.

In fact, deep sleep is rare among today's prey, which is obviously the result of natural selection, which makes sense. In today's highly evolved sleep, stupid animals are less fixed by deep sleep than smart animals. But why are they sleeping? Why did it evolve into such a state of fixed depth? As for the primitive function of sleep, perhaps we can find a useful clue from the fact that dolphins, whales and aquatic mammals usually sleep little. Generally speaking, there is no hiding place in the ocean.

Predated animals rarely have deep dreamy sleep, which seems to be obviously the result of natural selection. This makes sense: when sleep is highly evolved, stupid animals lose their mobility less than smart animals in deep sleep. But why do animals fall into deep sleep? Why is there such an inactive state? The fact that dolphins, whales and aquatic mammals have little sleep can provide useful clues for the basic function of sleep. There is no hiding place in the ocean.

Isn't the function of sleep not to increase the vulnerability of animals, but to reduce it? Wells Weber of the University of Florida and Ray Mediz of the University of London believe that this is the case. As you can imagine, in the high-risk period, those stupid animals who can't keep quiet on their own initiative will be fixed by the ruthless arm of sleep. This is especially obvious for young carnivores. This is an interesting idea, and it may be at least partly correct.

Could it be that sleep not only does not increase the possibility of animal injury, but reduces the possibility? Wells Weber of the University of Florida and Ray Mediz of the University of London believe that this is the case. It is conceivable that in times of danger, animals that are too stupid to keep quiet automatically will involuntarily become motionless. This is particularly evident in the cubs of carnivores. This is an interesting view, at least partly correct.

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Venice, the world's nine unique means of transportation? Fengweichuan wharf

Venice ferry

There are only three bridges along the 3.5-kilometer-long Venice Grand Canal, so how do you cross it? By Traghetto (Italian for ferry), of course. A boring kind of gondola; These unpretentious ships transport passengers from one side of the canal to the other at a meager cost. You can get a Traghetto from any of the seven docks along the canal. Just look for the yellow sign to direct you to the dock. Every boat is rowed by two rowers-one at the bow and one behind the passengers, just like on a gondola-if you want to ride a horse like the Venetians, take a short trip standing up.

There are only three bridges on the Grand Canal in Venice, with a total length of 3.5 kilometers. How do you cross the river? Traghetto (Italian, of course? Ferry? Meaning). This kind of ferry boat is similar to the famous gondola, but not as exquisite and charming as gondola. These unpretentious ships can carry passengers from one side of the canal to the other for a small fee. You can take Traege to any of the seven docks along the canal. There will be some yellow signs telling you where to get on the boat. Find them. Every boat has two rowers, like gondola, one at the bow and one behind all the passengers. If you want to travel like the Venetians, put up with this short trip.

Pakistan-Tanga

Pakistan carriage

Save a few dollars in Pakistan and ride Thangka instead of the more commonly used rickshaws and taxis. Tangah is a kind of carriage, sitting on two big wooden wheels (not designed for comfort, so it will hurt your ass during a long journey! ), pulled by one or two horses. They are not attractive, but interesting, and have been widely used for entertainment in Pakistan, rather than as a practical way of traveling. Just be careful, they are not the fastest way to travel!

If you want to save some money in Pakistan, take Tangah instead of human tricycles or a taxi. Tangah is mounted on two big wooden wheels (wooden wheels are not designed for comfort, so be prepared, your ass will suffer in this long journey! ), take a carriage or two. Tangah doesn't look very charming, but it's interesting. In Pakistan, it is more and more widely used as a form of entertainment rather than a practical means of transportation. Please note that they are not the fastest way to travel!

Cambodia-Bamboo Train

Cambodian bamboo train

Those who are physically strong may want to take a bamboo train in Cambodia-the locals call it laver. Passengers sit on a temporary bamboo "train" driven by a generator engine (actually just a bamboo platform) with a speed of up to 40 kilometers per hour. Unmanned rails can make the ride bumpy, and the closest experience to luxury is sitting on a straw mat. But the ticket price is very low, which is a once-in-a-lifetime experience, because all the locals use them to travel. ..

Strong people may want to try taking a Cambodian bamboo train? Also known as seaweed by locals. Passengers sit in temporary bamboo seats driven by generators? Train? On the road (basically a bamboo platform), drive at a speed of 40 kilometers per hour. The unmanned railway tracks make the journey bumpy, and it is the most luxurious way to sit on them with straw mats. But the ticket price of bamboo train is very low, and it is a once-in-a-lifetime experience. All the locals use them to travel.

Philippines-Kipni

Philippine Kipnis

In fact, the manned transport vehicle driven by the ancient diesel engine and emitting exhaust gas on the streets of Philippine cities was pieced together for military jeeps during World War II. The jeep is decorated with colorful flags, eagles and stars, and is traditionally called "Taurus" and "Mr. Lover Boy". They travel at an overloaded speed, full of people and products, and often can't stop completely to let passengers get on and off. These dirty, worn-out old cars and their tampered diesel oil are the culprit of a particularly toxic air pollution and health problem.

These cars, which use ancient diesel engines and run wildly on the streets of Philippine cities, can't even spray a jet plane. In fact, they were assembled vehicles of military jeeps in World War II. Jipni is decorated with colorful flags, eagles and radiant lights, and has traditionally been given names such as "Taurus" and "Mr. Lover Boy". They carry too many people and goods, run at the highest speed, and often can't stop completely to let passengers get on and off. These dirty and worn-out machines and their diesel engines are the main reasons for producing a special toxic gas, which will cause air pollution and health problems.

Thailand? toot

Thailand tuk tuk che

Colorful three-wheeled tuk-tuk cars wander around Bangkok, fighting crazy traffic in hot, humid and polluted environment and stuffing passengers into the covered back seat. The impatient drivers of these rusty, high-powered golf carts sped from one lane to another, hardly noticing the mosquito convoys of heavy buses, rumbling trucks and other tuk-tuk drivers. When you are free, you will have a chance to really enjoy how noisy vehicles themselves cause pollution. Tourists often find themselves sent to an extra and unexpected place, because tuk-tuk drivers try to get commissions from the shops they happen to detour.

Colorful three-wheeled tuk-tuk shuttles through Bangkok, cramming passengers into the back seat, fighting against crazy traffic and rushing in the heat, humidity and pollution. Impatient drivers drive these rusty golf carts with increased horsepower from alley to alley, almost ignoring the existence of heavy buses, roaring trucks and other beeping cars as many as mosquito fleets. When you are free, you will have a chance to really appreciate how these noisy vehicles themselves make great contributions to pollution. Contribution? Yes On the way, tourists often find themselves parked in an inexplicable place, because there happens to be a shop that can earn extra commission on the detour taken by the tuk-tuk driver.

India-Hello, Elephant

Indian elephant car

"Howdah" is translated as "Throne", which can be traced back to the era when gorgeous platforms transported members of the Indian royal family from one place to another. Nowadays, it is often a group of tourists, rather than the traditional aristocratic load, the burden of these big animals. You can turn An Ge from a simple seat and canopy into a gorgeous, gold-plated and gem-encrusted carriage with windows.

Howdah translated into? Throne? Take us back to the past, and the Indian royal family got on this gorgeous ride? Tools? The days from one place to another. Nowadays, these behemoths are often filled with a group of ordinary tourists, rather than traditional aristocrats. Indian elephant cars can be simple seats and canopies, or luxury cars with gold plating, gemstones and windows.

Alaska? Sled dogs

Alaskan Malamute

In Alaska or Yukon, dog-drawn sleds have been replaced by snowmobiles in some communities. But die-hard husky lovers still choose canine strength. In places like Denari National Park, where motorized alternatives are illegal, delivery, veterinary visits and even Alaska census visits are sometimes done by sleds.

In Alaska and Yukon, some communities have replaced dog sledding with snowmobiles. But stubborn Eskimo dog lovers still choose to use dogs as power. In Denari National Park and other areas, it is illegal to use sled dogs as electric substitutes; But in Alaska, dogs are still used to pull sleds when delivering goods, calling veterinarians and even conducting census visits.

Peru? Balko de Totora

Totora Peru.

Totora is a kind of reed growing in Peru, the most famous of which is on Lake Titicaca. The Uros are a group of people who live on floating islands made of reeds on the lake. They also made Barco d e Totora from bundles of dried reeds, and these ships have become the symbols of Peru. If you visit Lake Titicaca, Barco de Totora is a wonderful and unique way to cross the vast and beautiful waters.

Totora, a reed growing in Peru, is the most eye-catching spot on Lake Titicaca. Urus is a group of people living on a floating island formed by reeds in Lake Titicaca. They can also make Totora boats out of bundles of dried reeds, which has become a symbol of Peru. If you want to visit Lake Titicaca, taking the Totora boat is a unique and good way to cross this huge and beautiful lake.

London-DUKW

London amphibious military vehicle

DUKW, widely pronounced as "duck", was an amphibious truck designed by the US military during World War II, which was used to transport equipment and troops on land and water. Now, you can take a veritable duck tour in DUKW, central London. On a trip, you will drive past famous landmarks in London, such as Big Ben, London Eye and Trafalgar Square, then jump into the Thames dramatically and watch the scenery from the water. This is the only way to experience the scenery of central London by land and water-without leaving your comfortable seat!

DUKW, usually pronounced "duck", is an amphibious vehicle designed by the US military during World War II. It can transport equipment or soldiers on land or water. Now, you can take an amphibious military vehicle in central London for a so-called duck trip. On the way, you will pass the famous landmarks in London, such as Big Ben, London Eye, Loughborough Square, etc., and then enter the Thames dramatically to enjoy the scenery on the river. This is the only way to enjoy the scenery in central London. You don't have to leave your comfortable seat on land or on water!

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The left brain can filter noise.

An undated image of the human brain taken by scanning technology. Researchers from Japan, Canada and Germany have found that it is our left brain that selects the desired sound from the noisy and competitive sounds. [organization]

Want to know how we talk at a noisy party? Researchers from Japan, Canada and Germany have found that it is our left brain that selects the desired sound from the noisy and competitive sounds.

Ryusuke Amiga, a researcher at Japan's National Institute of Physiological Sciences, wrote: "In daily life, we are always exposed to several kinds of noise at the same time, and we must extract important signals from the background noise, such as speech."

"We found that in noisy environment, the left hemisphere usually dominates auditory processing," he wrote in an email in response to Reuters's question.

As we all know, speech signals are processed in the left brain.

But this study, led by Hidehiko Okamoto and Christo Pantev of the University of Mü nster, Germany, has deepened our understanding of how the human brain can focus on the specific sound it wants and process it.

In the latest issue of online magazine BMC Biology, scientists said that they used neuroimaging technology to observe the neural mechanism of volunteers who were exposed to different tests and background sound combinations.

They wrote: "The test sound is either placed in the left ear or the right ear, while the competitive noise is either placed in the same ear or in the opposite ear."

"By monitoring the brain's response to these different sound combinations, the research team observed that in a noisy environment, the left hemisphere is the site of most neural activities related to sound processing."