Some people tend tostick to their positions all the time，as they think the longer one works in a particular field，the more skillful one will be at it.Some have been teachers all their lives.Some devote all their energy to scientific research.Such people love their work and turn out to be specialists in their own fields.They are usually high achievers.
Some are different.They are in the habit of job-hopping，for they always purpose what is new and stimulating.They never seem content with their present situations.They like to meetmore people，make more money and new acquaintances，so they hop from job to job.
As far as I am concerned，I am not in favour of constant job-hopping.I believe in a famous proverb，A rolling stone gather no moss.I want to be professionally strong.And I respect those who devote themselves to their affectionate jobs throughout their life.
Recently, the problem of has aroused peoples concern.
Internet has been playing an increasingly important role in our day-to-day life. It has brought a lot of benefits but has created some serious problems as well.
Nowadays, has become a problem we have to face.
It is commonly believed that / It is a common belief that
Many people insist that
With the development of science and technology, more and more people believe that
A lot of people seem to think that
Taking all these factors into consideration, we naturally come to the conclusion that
Taking into account all these factors, we may reasonably come to the conclusion that
1. 电子商务 electronic commerce
参考答案：In digital era, electronic commerce plays an increasing role in the field of economy.
2. 投资 investment
参考答案：In line with international convention, education investment in a country should account for 40 percent of Gross Domestic Product (GDP for short).
3. 购买力 purchasing power
参考答案：Economic growth brings citizens greater purchasing power which makes it available for them to cover education, travel，daily expenses and so forth.
4. 消费 v. consume ;n. consumption
参考练习：Today while living level are greatly advanced, rational consumption should be advocated even more.
Generally the tendencies of three countries keep up though there are some differences among them. The Japanese old people aged 65 and over account for 5% in 1940 which is the lowest proportion in three countries. The situation will remain till about 20xx. After that its proportion has a suddenly rise and exceed the other countries’ proportion. Till 20xx, it will reach it peak of 27%.
The USA old people’s proportion is a little more than the Sweden’s. However this trend was reversed in 1999. After this year, the proportion of Sweden has a sharp rise till 20xx while the USA ‘s proportion remain a steady at the same time. From Joozone.com.
In summary, before 20xx the proportions of aged people of three countries were remained under 15%. But after 20xx, these proportions will exceed 20%.