2016年大学英语四级作文范文合集20篇

As the saying goes "qiu dong smog knife to kill". We can see and catch

"smog" actually have bigger influence on the body, especially the high incidence

of respiratory and cardiovascular and cerebrovascular diseases in the elderly

group.

1. The effects on the respiratory system. Haze composition is very

complicated, including hundreds of atmospheric chemistry particulate matter.

Which is bad for your health mainly aerosol particles less than 10 microns in

diameter, such as mineral particles, sea salt, sulfate, nitrate, organic aerosol

particles, fuel and car exhaust, etc, it can directly enter and adhesion in the

human respiratory tract and alveoli. Especially the submicron particles are

deposited on upper and lower respiratory tract and alveolar, causes the disease

such as the acute rhinitis and acute bronchitis. For obstructive bronchus

asthma, chronic bronchitis, emphysema and chronic respiratory diseases such as

chronic obstructive pulmonary disease patients, haze weather can make the

illness acute or acute exacerbation. If this kind of environment will cause lung

cancer for a long time.

2. The effects on the cardiovascular system. Haze weather pollutants in the

air, air pressure is low, easy to induce acute cardiovascular disease. Such as

heavy fog, the moisture content is very high, if people in outdoor activities

and sports, the bodys sweat is not easy to discharge, cause people bosom

frowsty, increased blood pressure.

3. The fog haze weather can also result in close formation ultraviolet

weakened, activity of the infectious pathogen in the air, increase of infectious

diseases.

4. Reduce because of the fog the sun, ultraviolet irradiation in children

is insufficient, inadequate vitamin D in the body to generate, the absorption of

calcium significantly reduce, serious can cause rickets in infants, childrens

growth to slow down.

5. Affect mental health. Heavy fog weather depression, due to weak light

and easy to let a person produce mental laziness, depression, and pessimism,

encounter something goes wrong and even easier to spin out of control.

6. Affect the traffic safety. Low vision in haze weather, visibility, air

quality is poor, easy to cause traffic jams, traffic accidents.

I am a third year master major in automation at Shanghai Jiao Tong

University, P. R. China. With tremendous interest in Industrial Engineering, I

am writing to apply for acceptance into your Ph.D. graduate program.

Education background

In 1995, I entered the Nanjing University of Science & Technology

(NUST) -- widely considered one of the China’s best engineering schools. During

the following undergraduate study, my academic records kept distinguished among

the whole department. I was granted First Class Prize every semester,In 1999, I

got the privilege to enter the graduate program waived of the admission

test.

At the period of my graduate study, my overall GPA(3.77/4.0) ranked top 5%

in the department. In the second semester, I became teacher assistant that is

given to talented and matured students only. This year, I won the Acer

Scholarship as the one and only candidate in my department, which is the

ultimate accolade for distinguished students endowed by my university.

Presently, I am preparing my graduation thesis and trying for the honor of

Excellent Graduation Thesis.

Research experience and academic activity

When a sophomore, I joined the Association of AI Enthusiast and began to

narrow down my interest for my future research. With the tool of OpenGL and

Matlab, I designed a simulation program for transportation scheduling system. It

is now widely used by different research groups in NUST. I assumed and fulfilled

a sewage analysis & dispose project for Nanjing sewage treatment plant. This

was my first practice to convert a laboratory idea to a commercial product.

In retrospect, I find myself standing on a solid basis in both theory and

experience, which has prepared me for the Ph.D. program. My future research

interests include: Network Scheduling Problem, Heuristic Algorithm research

(especially in GA and Neural network), Supply chain network research, Hybrid

system performance analysis with Petri nets and Data Mining.

When students are going to high school, they are under great pressure,

because their main goal is to enter the college, so they need to work so hard.

The school will test them so often that they want to get the best scores.

Cheating on the exams is many students’ choice, as they could not do well on the

exam, so they want to find the confidence by getting the high marks. Other

students even buy the exam answers, what they do is totally wrong. Frist, it

will cost students a lot of money on buying the answer, it refers to spend their

parents’ money, it is not easy to earn money. Second, the answers that students

buy are not accurate all the time, most of the answers are wrong, students are

easy to get cheated. Students should work hard to improve their study.

Because of the high developing speed of the world, pressure has become a

serious problem in nowadays. As our students, we also have to face with much

pressure, such as the study pressure, exam pressure,relationship pressure and so

on. But how can we cope with pressure? This is the most important.

Firstly, we should face the pressure appropriately. Pressure is inevitable

in our daily life, so we cant be afraid of them and try our best to cope with

them. Secondly, tell our pressure to others. Talking is a very effective way to

ease pressure, and during the talking, we may get some suggestions and

solutions. Finally, trust ourselves. We should believe ourselves that we can

deal with any troubles by ourselves or by others help.

I have a dream. When I grow up, I want to be a scientist. I want to make a

robot by myself. It can help my mother to do the housework, help my father to

drive his car, and help me to walk my dog. I think my parents will like it very

much.

Zhang Ying is my good friend. She’s in Class1, Grade4 in Tianjiao Primary

School. She’s a model student. She’s smart and she’s helpful, too. She often

helps teachers and young students at school. She is good at Chinese, math,

English, arts and crafts, music and so on. She has a lot of hobbies. She likes

painting and drawing. And she likes listening to music, having picnics with her

parents. Oh yeah, she likes fishing, too. But she doesn’t like playing

basketball, football, table tennis or volleyball. Zhang Ying is the best friend

of mine. I like playing with her. We always work together and help each

other.

In China, tea has a very long history, and has formed a Chinese tea

culture. At the same time, tea is good for our health and is loved by many

people. Chinese tea culture is broad and profound. It includes not only material

culture, but also profound spiritual civilization. Talking about Chinese tea.

Can be traced back to ancient times, it is from the Tang Dynasty and Song

Dynasty flourished.

From then on, the spirit of tea permeated the court and society, and went

deep into Chinese poetry, painting, calligraphy, religion and medicine. For

thousands of years, China has accumulated a large number of tea cultivation and

production of material culture, but also enriched the spiritual culture of

tea.

The longing summer vacation is approaching, it is the best part of the

school year for me. I cannot let the holidays elapse (逝去) meaninglessly, my

vacation should be a phase (时期、阶段) of harvest. The events in my plan should give

me a sense of infinite potential.

The following plan may reveal the intensity of my desire to travel, work

and study in this vacation. In the first few days I want to climb Mount Hua Shan

with several friends to refresh ourselves. Then I tend to visit relatives,

senior school teachers and former classmates(老同学). Besides, to find out the best

ways to cultivate my abilities, I will find a part time job and conduct some

social investigation.

In short, I want to do interesting things in the summer vacation. Whatever

I do, the goal is the same: to get necessary experience, acquire knowledge and

broaden my horizons. Though the six week vacation will pass away at lightning

speed, its influence is bound to last long.

No matter the day is how to spend endless， the sun always rises and falls，

flowers always bloom and wither， around heavy traffic is always fleeting， stand

at the time of the tail， we kept after the mist as ignorant of the future.

Too many people always sigh the cruelty of time and the helpless of growing

up。 In fact， growth is really a caterpillar into a butterfly process， always

undergo a metamorphosis of pain， you can better meet the chocolate as unknown

world。 All that let go or no one saw tears in a few years back， you can get

unexpected! The road of the future， whether rugged or smooth， requires you to go

and taste it alone.

Eileen Chang wrote an article about "road"， referring to the way of growth。

This road is a road that everyone must take。 Those who pass by advise the people

who are going this way not to choose the road， because it is so rough and long

that it is refuted： "since you can walk this way， how can I not go out?"。" Thus，

one after another people go through this road full of hardships， perhaps this is

the true meaning of growth。 Knowing that he might fall into it， he obstinately

persisted in his choice.

I think that the child will never grow up Peter Pam， who said he had no

regrets can not grow， we are always sad to miss the past endlessly all say

"dont grow up， never grow up， if you really can not grow up， you really dont

care? Every time there is a time of happiness。 In any case， we will grow up as

time goes by from the palm of the palm.

Growing up is like a mysterious fruit。 Some people resist it hysterically，

and some people cant wait to taste it。 But only when we grow up can we get more

and better world.

When we are very small, we dream to be the great person in the future, such

as the scientist, the policeman and so on. It is good for the children to own

the big dream, so that they will study hard and fight for their future. But the

fact is that not all the person can become the great person, most people are

doing the ordinary jobs. In my opinion, ordinary is beautiful, too. Though they

are not doing the fine jobs, they find their own place and make a contribution

to the world. Take the cleaner for example. They wake up early and do the

cleaning work. People dare not to do the job because it is so dirty, but the

cleaners decorate the city with their hard work. The cleaners are the ordinary

people while doing the great job.

It is widely accepted that to work independently has the obvious advantage

that it can prove one’s ability. However, I believe that teamwork is more

important in the modern society and teamwork sprit has become a required quality

by more and more companies.

In the first place, we are situated in a complicated society and we often

encounter tough problems that are beyond our ability. It is especially at this

moment that teamwork proves to be exceedingly important. With the help of the

team, these problems can be solved easily and quickly, which could improve work

efficiency.

In the second place, teamwork provides a chance to cooperate with workmate,

it will make a friendly and enjoyable work environment, which is an important

factor influencing employees’ belief in the company as a good workplace.

Finally, teamwork contributes to the prosperity of the companies. With all

workmates’ knowledge combined, the companies possess high work efficiency and an

ability to deal with whatever problems. As a result, the companies can make more

profits and develop more quickly.

In sum, teamwork is very important, no one could live individually, they

must rely on others in some way. Hence, work together could make life

easier.

It is known to all that Guangxi province is famous for its various culture,

because there are many minorities. Recent years, the local government carry out

a policy of taking a break on March 3rd, which makes it the special day for

Guangxi Province. People can enjoy some shows which are full of local features,

such as singing local songs, having dragon-lion dance and so on. This policy not

only lets people take relax from routine work, but also makes people remember

their culture. I am part of the local people and I am so proud of the variety.

The different culture makes our country full of charm.

Things in life than the books. It can let us know the heaven and earth,

know life. It makes our temperament, not pleased by external gains, not to

sorrow. Books are our spiritual lair, the source of life. Achievements of

ancient and modern, Chinese and foreign, to has close relationship with books,

and is good at absorbing nutrition from the book. Get into the habit of hobby is

reading books from the reading, to experience the fun of reading, learning and

mastering some reading method, this is not the first great thing in life? Now, I

will share with you to read all kinds of fun!

A great pleasure in reading than when you when you are racking their brains

for a problem, mystery, or on a particular question seems to smell, open the

book, you will find that has been done to the full, in SAO itch you. The

"steady" feeling you so comfortable, so comfortable.

Reading for fun, different people have different for engaged in manual

Labour, a leisure reading; For people engaged in mental Labour, the book can be

a panacea, boredom, reading can be permitted; When sorrow, reading can lotus;

Reading can be smoothly when excited...

Reading gives a person is calm, quiet, comfortable happy, is fame, money

can not be replaced, the spirit of the book, like the human nutrition agent,

without it, life will be defect. Let us not leave a regret, picked up the book!

Sure you can understand the true meaning of life from the book!

With the development of e-commerce, shopping online becomes a new way of

shopping which is getting more and more popular. Many citizens are likely to

shop through internet nowadays.

Generally speaking, shopping online offers lots of advantages with its

convenience the most prominent. There are many commodities on the internet where

you can search whatever you want. Besides, you just click the mouse can you get

all information you want, so that you don’t have to go to the shop personally.

In addtition, the commodities on the Internet is usually cheaper than the stores

which can save much money.

However, everything has two sides. You can not see the products or check

their qualities and some of the sellers on the Internet is not so honest. And,

for those who enjoys shopping around different stores, shopping online perhaps

will make them bored.

In my opinion, shopping online has more advantages than disadvantages, and

with the improvement of e-commerce, there will be more people to shop on the

Internet.

Knowledge can be acquired from many sources. These include books, teachers

and practical experience, and each has its own advantages. The knowledge we gain

from books and formal education enables us to learn about things that we have no

opportunity to experience in daily life. We can study all the places in the

world and learn from people we will never meet in our lifetime, just by reading

about them in books. We can also develop our analytical skills and learn how to

view and interpret the world around us in different ways. Furthermore, we can

learn from the past by reading books. In this way, we won’t repeat the mistakes

of others and can build on their achievements.

Practical experience, on the other hand, can give us more useful knowledge.

It is said that one learns best by doing, and I believe that this is true,

whether one is successful or not. In fact, I think making mistakes is the best

way to learn. Moreover, if one wants to make new advances, it is necessary to

act. Innovations do not come about through reading but through experimentation.

Finally, one can apply the skills and insights gained through the study of books

to practical experience, making an already meaningful experience more

meaningful. However, unless it is applied to real experiences, book knowledge

remains theoretical and, in the end, is useless. That is why I believe that

knowledge gained from practical experience is more important than that acquired

from books.

In recent years, China’s food industry occurs security issus frequently,

which makes people worried and lose confidence. Food safety, related to the

people’s health, safety and healthy development of economy, is the major issue

of national stability and social development. Since the Sanlu Incident occurred

in 2008, the entire society increasingly concerned about food safety issue. It

was in this context that the food safety issue was referred to an unprecedented

level.

There are the following main issues in food security: using poor quality

raw materials in the food manufacturing process, adding toxic substances,

excessive use of food additives, abusing of chemical additives and so on. There

are many reasons to cause this problem, and regulators, producers and even

consumers share responsibilities. The entire society should try effort to avoid

food safety issues.

The Great Wall of China is called the "Ten thousand Ii Great Wall" in

Chinese. In fact, it s more than 6 000 kilometres long. It winds its way from

west to east, across deserts, over mountains, through valleys till at last it

reaches the sea.It is one of the wonders of the world.The Great Wall has a history of over twenty centuries. The first part of it

was built during the Spring and Autumn Period.

During the Warring States Period, more walls were put up to defend the

borders of the different kingdoms.It was during the Qin Dynasty that the kingdom of Qin united the dif ferent

parts into one empire.

To keep the enemy out of his empire, Emperor Qin Shi Huang had all the

walls joined up. Thus, the Great Wall came into being.The Great Wall is wide enough at the top for five horses or ten men to walk

side by side.Along the wall are watchtowers, where soldiers used to keep watch.Fires were lit on the the towers as a warning when the enemy came.It was very difficult to build such a wall in the ancient days without any

modern machines.

All the work was done by hand. Thousands of men died and were buried under

the wall they built. The Great Wall was made not only of stone and earth, but of

the flesh and blood of millions of men.

Today the Great Wall has become a place of interest not only to the Chinese

but to people from all over the world. Many of them have come to know the famous

Chinese saying: "He who does not reach the Great Wall is not a true man."

The Great Wall is famous all over the world, it is one of the most

remarkable symbols of China, it has long history. But as there are more and more

people to visit the famous building, it has been damaged to some degree. In

order to protect the great building, we should not throw away the rubbish and do

not make some marks, so that we can enjoy the great building.

Pressure seems to be a natural part in our daily life in this competitive

society. Like it or not there is always pressure of one kind or another. And it

seems there is hardly any way to avoid it or get rid of it. Moreover, as the

pace of modern life continues to quicken, pressure seems to be on the increase

all the time.

Different people have different ideas about pressure. Some hold that

pressure is something very vicious. If there is too much of it, it will lead to

the decline of ones physical and mental health. So they are always complaining

about it or trying to flee from it. They think, only relaxation, the opposite of

pressure, is what we should desire. On the other hand, others argue that

pressure is not as bad as is often thought. In fact a certain amount of pressure

is essential to provide motivation and meaning to our life. It is pressure that

propels our progress and contributes to our success.

Personally, Im in favor of the latter idea. I believe that a little

pressure is certainly an important incentive in life. It is only when the

pressure gets out of control can it lead to poor performance and bad health.

Since it is impossible to avoid pressure, certainly there is no sense trying to

do so or complaining about it.

Smoe people say that money is the best thing in the world. But I consider

reading books as the best and the most precious thing one can ever have.

Reading books is very important. First of all, it is knowledge that makes

society develop and by reading books you can get all kinds of knowledge.

Furthemore, reading books makes you a qualified person and makes your life

enjoyable.

One is never too old to learn. No matter what time you rcalize the

importance of reading books, you can enjoy it during the rest of your life time.

Love books, for they are your best friends.

travelingis usually boring. There are always too many people in the places

of interest in China and it is crowed everywhere, when it comes to the golden

weeks, this situation could be worse. Just imagine that you are waiting in line,

hungry and thirsty. All you want is a ticket that can get through the door to

see the beautiful view. You may complain: “why am I coming to the terrible

place? Why I do this to myself?” If you are unlucky, you may encounter a bad

guide who forces you to shop here and there. How horrible it is! What’s worse,

you may spend more money than usually does.

Why don’t you just stay at home and enjoy the cozy life? You don’t need to

go outside to see the view, you can just turn on the TV or computer, the amazing

view will represent in front of you. You not only save a large sum of money, but

also your precious time. And you can do other things too, such as watching a

classic movie, chatting with friends on the phone or surfing the Internet. This

could be so much fun! Therefore, I prefer to stay at home instead of going

outside.