What are the characteristics of Canadian English and what is Canadian English?

Pronunciationally, even Americans or Canadians can have a hard time distinguishing between American English and Canadian English. The pronunciation of Canadian English is almost exactly the same as the accent of the American Midwest, except that it is closer to British English in the pronunciation of some vowels.

In terms of spelling, some words in Canadian English use British spelling, such as colour, honour, centre, defence, some words use American spelling, such as tire, curb, and some words are spelled according to the change of parts of speech, such as practice (noun), practise (verb), licence (noun), license (verb).

In terms of terminology, Canadial English does not use in addition at the beginning of a sentence, but uses as well. This is a unique additive usage, which is not available in the United Kingdom and the United States.

In terms of vocabulary, although Canadian English and American English have the most words in common, because Canada belongs to the Commonwealth, its political, legal and business systems are British, so the corresponding professional vocabulary is also British.

British pronunciation is relatively flat, and I personally feel that their voice is more thick American is the tongue curl, many Chinese prefer the pronunciation, such as call, the United Kingdom is directly sent flat, the United States has to roll down. And the mouth will open very exaggeratedly. For example, boss is pronounced more like bus

There are also can, cannot, and it's hard to hear the difference without the meaning of the sentence. There is also a blast that even reads better than the British one.

Australia's is more British, and Canada's is more American.

One of my foreign teachers is of mixed descent, including Britain, the United States, Australia, and Canada. His English. As you can imagine, it's too powerful, it's too powerful.

Generally, if you require an institution with oral test results (such as foreign language schools, or foreign-related majors, such as foreign affairs, countries, international politics, etc.), the oral test score is generally required to be above B!

There are also more special, English oral interviews, such as the University of Hong Kong, which require the interview to be in English! This is because the University of Hong Kong is taught entirely in English.

But the situation you are talking about should belong to the first category! This major requires an oral examination score!

As the name suggests: is the English language spoken in the country of Canada.

Many of the common expressions and usages are different from British English.

Discharge cooling is another type of convection cooling. Unlike regenerative cooling, the coolant used for exhaust cooling absorbs heat to the thrust chamber and is discharged out of the combustion chamber instead of entering the combustion chamber to participate in combustion. Direct drain coolant reduces the thrust chamber specific impulse, so the coolant flow for drain cooling needs to be minimized while only using drain cooling at the outlet section of the nozzle that is relatively less heated.

There is also radiative cooling, in which the heat flow is transferred from the combustion products to the thrust chamber, and then the heat is radiated by the thrust chamber wall to the surrounding space. Radiative cooling is characterized by simplicity and small structural mass. It is mainly used in the extension section of large nozzles and the thrust chamber of small thrust engines using high-temperature resistant materials.

When cooling in the thrust chamber of the tissue, a relatively low temperature liquid or gas protective layer is established on the surface of the thrust chamber wall to reduce the heat flow to the thrust chamber wall, reduce the wall temperature, and achieve cooling. Internal cooling is mainly divided into three methods: internal cooling (shield cooling), membrane cooling and diaphoretic cooling of head tissues. After the internal cooling measures are adopted in the thrust chamber, the mixing ratio near the wall of the combustion chamber is different from the optimal mixing ratio in the central area (in most cases, the near-wall layer rich in fuel is used) due to the need to reduce the temperature of the protective layer, resulting in the uneven distribution of the mixing ratio along the cross-section of the combustion chamber, so that the combustion efficiency is reduced to a certain extent.

Membrane cooling is similar to shield cooling in that it cools the thrust chamber wall by establishing a uniform and stable coolant film or air film protective layer near the inner wall surface, except that the coolant used to establish the protective layer is not injected by the injector, but is supplied through a special cooling belt. The cooling band is generally arranged in a cross-section of the combustion chamber or the convergence section of the nozzle. There can be several cooling bands along the length of the combustion chamber.

In order to improve the stability of the membrane, the coolant often flows through the gaps or small holes in the cooling belts, and when sweating is used, the thrust chamber wall or part of the inner wall is made of porous material with a pore diameter of tens of microns. Porous materials are usually sintered with metal powders or pressed with metal mesh. In this case, the number of pores per unit area is increased by making the micropores in the material as evenly distributed as possible.

The liquid coolant penetrates into the inner wall, creating a protective film that reduces the density of the heat transferred to the wall. When the flow rate of liquid coolant used for sweat cooling is above a certain threshold, a liquid film is formed near the wall of the thrust chamber. When the coolant flow rate is below the critical flow, the inner wall temperature will be higher than the coolant boiling point at the current pressure, and some or all of the coolant will evaporate, forming an air film.

In addition to the above thermal protection, there are other thermal protection methods such as: ablation cooling, thermal insulation cooling, hot melt cooling and composite protection of chamber walls. 3. Thermal protection scheme of high enthalpy gas generator Based on the above methods and the actual situation, the thermal protection method of high enthalpy gas generator is obtained.

The combustion chamber of a high-enthalpy gas generator differs from that of a liquid rocket engine, eliminating the front thrust chamber part, making its structure simpler and more effective. Then, the thermal protection involved is the thermal protection part of the combustion chamber wall. As the fuel enters the combustion chamber, it quickly decomposes and releases large quantities.