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¡¾ÌâÄ¿¡¿ How are you getting on with your subjects? Maybe you are the _______ in your class. In the last few exams one or two even several your classmates ______ higher marks than you. How do you feel? Are you jealous(¼µ¶ÊµÄ) of them? Are you _____ them? Please think it over after reading the following text. You will probably learn a lot.
Once a zoologist _____ antelopes(ÁçÑò) which were living on both sides of a river in the Public of South Africa. He discovered that the antelopes on the east side multiplied more and ran faster than _____ on the west.
The zoologist puzzled after long pondering(Éî˼) about the differences. As the two groups of antelopes lived in the same environment and they _____ the same kind of grass.
One year, _______ the help of the Animal Protecting Society, he caught ten antelopes on each side and exchanged them. A year later, the ten antelopes _____ to the west bank multiplied by fourteen while only three remained of the ones sent to the east. Where were the other seven? They had been eaten by wolves!
At last the zoologist understood why the antelopes on the east were stronger. That was because on the east side there _____ a group of wolves-their natural enemy!
Not everything is plain sailing in your life. It is your opponents(¶ÔÊÖ) that ______ you indeed. So thanks must go to your opponents. It's true!
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¡¾ÌâÄ¿¡¿ Imagine having a printer that could make anything. Need new shoes? Just choose a style and size and then print some.
No machine can make all of these things, but 3-D printers are getting very close. Traditional printers put ink on paper. But 3-D printers work with plastic, metal or other materials, including food. Invented in the mid-1980s, 3-D printing is a new technology (¼¼Êõ).
In the past, 3-D printers were so expensive that only large companies could afford them. In the last one or two years, their cost has dropped greatly. Today, you can buy a 3-D printer for as little as $300. The technology offers the potential (¿ÉÄÜÐÔ) to print anything at home. When you want something, you needn¡¯t buy it in a store or order it from a factory.
3-D printing can be fun too. For the Valentine¡¯s Day (ÇéÈ˽Ú) last year, a Japanese company used a 3-D printer to make chocolate copies of people¡¯s faces. At the Fashion Week in Paris, 3-D printing made an appearance too. The clothes were made for show, not for everyday use. But that could soon change. A designer says, ¡°It will only be a matter of time before we see the clothing we wear today produced with this technology.¡±
3-D printers | |
¡¾1¡¿ | ¡ô It is a new technology that started in the¡¾2¡¿. Traditional printers ¡¾3¡¿ by putting ink on paper. ¡ô It uses plastic, metal, food and other things as¡¾4¡¿. |
Potential | ¡ô People can now afford 3-D¡¾5¡¿, because they¡¯re much¡¾6¡¿. ¡ô People can print anything at home instead of buying it in a store or¡¾7¡¿ it from a factory. |
Example | ¡ô Valentine¡¯s Day in Japan: Chocolate copies of people¡¯s faces ¡¾8¡¿ by a 3-D printer; ¡ô The Fashion Week in Paris: ¡¾9¡¿ for show made by a 3-D printer. |
¡¾10¡¿ a designer say | It will only be a matter of time before we see the clothing we wear today produced with this technology. |