Tony loves to read all kinds of books. He reads in his free time. His classmates laugh at him, but his parents and his teachers think he is great. They say reading is useful, and it is a good habit.

One day, Tony read a book about robots. He told his classmates all about them. The next day, Tony’s science teacher asked her students to do a project（项目）about robots in five days. All students would like to join Tony’s group (小组) .

At last, Tony, Linda, and Joe were in one group. They first read Tony’s book about robots. They also visited the science museum. Then the group met at Joe’s house to make a model robot. Tony had many good ideas. It took them only one night to make the robot.

The robot looked great. The three students were very happy. When they gave the robot to their teacher, the teacher said, “How cool!” . All the students liked it.

Facial recognition (人脸识别) cameras are everywhere, including in your phone. Many people depend on this technology to unlock (解锁), open doors or pay for things quickly, but there is a problem: everyone is wearing masks (口罩).

Now, the companies have improved the facial recognition technology. It can now work well even if people are wearing a mask. A company in Beijing named Hanwang has said that their product can correctly recognize (识别) 95 percent of people wearing masks. What’s the secret?

Facial recognition software (软件) is about more than just unlocking your phone. This technology is also about public safety. For example, you don’t need to show an ID card, which can be lost or stolen. It also means that diseases aren’t spread by touching things. It has become especially important now because of the COVID-19. It helps with safety and peace of mind.

There is also a weakness of this technology: it fails when people wear both a mask and sunglasses. In this situation, all of the key facial information is lost.

Yesterday Mrs. Read could not find her key in the room. “Where is my key?” she asked herself. She looked for it everywhere, but couldn’t find it. She did not know what to do. She thought hard and then had an idea. “Hello!” she said in a low voice. “Hello!” a voice came from inside the drawer(抽屉) of the desk. She was happy to hear that. She went to the desk and opened the drawer. What was that! It was her key. So she took out the key from the drawer.

You see, that is a new kind of key in America. There is a small speaker(扬声器) in it. It can hear its owner’s (主人的) voice and say it again in nine meters.

Now if you forget where your key is, you can find it quickly.