There is a popular belief that goldfish only have a three-second memory. But a 15-year-old schoolboy from Adelaide has just finished an experiment to tell us that it is not true. He shows everybody that the goldfish is smarter than we think.

    "I don't believe that they had a three-second memory because animals need their memory, so they build up over time a knowledge of where the food is," said Rory Stokes, a student at the Australian Science and Mathematics School.

    He did the experiment in a small tank(鱼缸)of goldfish. "I decided to get a bit of red Logo and just feed them next to that. Every day I'd put it in and spread food around it." He said.

    "At first they were a bit scared of it, but by the end of the three weeks, they were actually almost coming before I put the food in."

    After leaving the fish alone for a week, Rory placed the red Logo block in the tank again.

    "They remembered perfectly well," he said.

    "They actually had a time faster than the average(平均)of the three feeds before I left."

    The goldfish showed that they not only could store information, but also had the ability to get it back at a later date.

    Culum Brown, a researcher at Sydney′s Macquarie University, has studied fish behavior for more than ten years.

    He says his studies of Australian native fish show fish are smart animals that know how to avoid enemies and catch food like any other animal.

    "The thing that I really liked about Rory′s experiment is that he not only got that classical conditioning going but the fact that he could get thorn next just to that specific coloured marker. I thought it was really good." He said.

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Li Hua

Hi! After reading your story,

Big schoolbags have been a big problem for students for a long time. Maybe 1 schoolbag is too heavy to carry, and it troubles you a lot2 you want to take out a book to read. Now e-textbooks will 3 you.

It is said that many Chinese middle schools are going to use e-textbooks. An e-textbook, in fact, is a small computer 4 students. It is much lighter than a usual schoolbag and5 to carry. Though it is6 small as a book, it can hold(容纳) everything for study. The students can read the text page by page on 7 screen, take notes 8 the special "pencil", or even "hand in" homework to their teachers by9 emails. All they have to do is press a button(按开关).

Some people say e-textbook are good,10 some say they may be bad for the students' eyes. What do you think of it?

Hi, I am Mary. I am a middle school student. My school is a very beautiful place. There is a big library with books of all subjects in my school. There are a lot of storybooks and newspapers in the library too. It is in the classroom building.

In the library, there are rows (排) of tables and chairs. It looks very clean. And it's easy for students to find books. We can sit there to read books or borrow books from it. We can take two or five books at a time (一次) and we must give back (归还) the books in a week.

Our library teacher is a nice woman. She is friendly to all students. We all like her. She helps us find books. When we ask her some questions about book, she is happy to answer.

I like reading books. Every day, I go to the library to read books. I love to visit my school library. It's a good place to read and study.

If you want to enter the subway, you have to hold your transportation card or smart phone in your hand. Would it be a trouble if you are busy with other things, such as taking care of your children or dogs. 

Now, good news has arrived for some passengers. A subway line in Shenzhen uses 3D facial recognition(人脸识别) technology to help recognize passengers. All they need to do is downloading(下载) the required app, and then they can enter the station just by looking into a screen at the gate for about 2 seconds. In this way, they can enter the subway more quickly than scanning a OR code (扫描二维码). The new technology greatly speeds up entry times. Now, about 30 to 40 passengers can pass through the entrance every minute. 

Facial recognition has been used in many other areas of our life. At KFC stores across China, customers can order their meals by scanning their faces in front of a self- serving screen. Customers used to carry bank cards or mobile phones to withdraw money, but now they can do that just by scanning their faces at the ATMs of banks. With the help of this technology, the security check(安检) step in the airport can be completed in about 12 seconds, according to Guangzhou Baiyun International Airport. 

Do you think facial recognition will totally take the place of OR codes?