ts26092004
22.08.2021 06:07

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Internal combustion engines are devices that generate work using the products of combustion as the working fluid rather than as a heat transfer medium. To produce work, the combustion is carried out in a manner that produces high-pressure combustion products that can be expanded through a turbine or piston. The engineering of these highpressure systems introduces a number of features that profoundly influence the formation of pollutants. There are three major types of internal combustion engines in use today: (1) the spark ignition engine, which is used primarily in automobiles; (2) the diesel engine, which is used in large vehicles and industrial systems where the improvements in cycle efficiency make it advantageous over the more compact and lighter-weight spark ignition engine; and (3) the gas turbine, which is used in aircraft due to its high power/weight ratio and also is used for stationary power generation.

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Vika15077
19.10.2021 07:01

It is very important to lead a healthy lifestyle. Everyone wants to live as long as possible, not get sick and always look good. To do this, you need to eat wholesome food, play sports, walk more and have an active life position. It is best from an early age to develop a daily regimen and monitor your diet. Sleep is of great importance in human life, so it is important to get enough sleep and go to bed and wake up in the morning at the same time. It is good to have breakfast with cereals, eat fish, vegetables, and dairy products. It is important to limit yourself to sugary and carbonated drinks.

перевод:

Очень важно вести здоровый образ жизни. Каждый человек хочет прожить, как можно дольше, не болеть и всегда хорошо выглядеть. Для этого необходимо есть полезную пищу, заниматься спортом, больше гулять и иметь активную жизненную позицию.

Лучше всего с самого раннего детства вырабатывать режим дня и следить за своим питанием. Большое значение в жизни человека занимает сон, поэтому важно высыпаться и ложиться спать и просыпаться по утрам в одно и то же время. Полезно завтракать кашами, есть рыбу, овощи, и молочные продукты. Важно ограничивать себя в сладком и газированных напитках.

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5675566
19.10.2021 07:01
Healthy FoodЗдоровая пищаIt’s very important to choose the right food nowadays. Healthy and balanced diet is useful for every person. We depend on food as well as the cars depend on gas, for example. It’s our natural fuel, which gives our body physical strength and health. When the body is healthy, the mind will also be healthy. Different types of food contain different nutrients for our body. Some supply us with carbohydrates, some with proteins or fats, some with vitamins and minerals, etc. Many people think that fat is bad for people and they try to cut down on it. There is even a special line of products, called low-fat. The problem is that we do need some kinds of fat, but the saturated fats from animal products, like red meat, butter and cheese, can be really bad for health. Friendly fats can be found in avocados, nuts and seeds, olives and tuna fish, and in some other products. Some people cut down on too much sugar and salt, which is also a good idea. One of the healthiest types of food is fruit and vegetables. Such organic products can be only useful if they don’t contain any chemicals and additives, which has become a common phenomenon in modern supermarkets. More and more people tend to grow fruit and vegetables in their own gardens, instead of buying them. Another problem is modified food. It’s much cheaper than ordinary food, which is why people often buy it. From the other hand, modified food can lead to dangerous diseases. The food people eat depends a lot on their culture, religion, beliefs, health and other factors. However, some rules are common for everyone. They are: less fat, sugar and salt; and more water, vitamins, fresh fruit and vegetables.
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