7. Computer
The computer is widely used in all fields of society. Today， wherever you go， you will find computers being used. For example， computers are used in universities， large corporations， and small offices， etc. It has even entered the homes of ordinary people. As it is able to store and process a large amount of information， the computer bring about great convenience and high efficiency to people of all walks of life. Computers can help people in different ways. For example， computer help scientists in analyzing data and doing complex calculation. For another example， computers are made use of by engineers in designing a plane， or a spaceship. Besides， computers may also play a great role in helping children with their lesson. Whatever you are doing， you many find computer a useful aid. However， the computer must be designed and instructed by man. What is more， it is true that computers can make decisions， but they need detailed instructions and programs prepared by humans to operate. Therefore， the computer can never replace the human brain.
8. Travelling
It is exciting to visit different places. As you travel， you will see beautiful sceneries typical of the region. Besides， you can meet and make friends with people of different colors and races. Finally， you can get to know the customs and living habits of the local people. Today people are so fond of travelling that tourism has become one of the faster growing industries in most countries. The main reason why people travel is， perhaps， for pleasure. For example， having worked hard throughout the weekdays， people will find a widened trip to the nearby mountains or beaches a real relaxation. For another example， spending an annual holiday travelling abroad is an especially satisfying experience for those who do not have much of an opportunity to be away from their homelands. When people return from their travel， they will generally feel fresh and energetic， ready to work harder. Travelling is also one of the best means for learning. You may have read or heard about something but you can never get an accurate picture of it until you see it for yourself. Seeing is believing. Furthermore， if you area careful observer， you can learn much during your travel about the geography， biology， and history of the places you visit. No matter how well educated you are， there is always a lot for you to learn through travelling. The knowledge acquired from travel， as you will have found in your life， is no less valuable than that from any influential reference book.
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