【推荐2】Some of you may play Ant Forest. It is a game on Ali pay. Users collect "energy" to make their "trees" grow. When the "energy" reaches a certain level (程度), some organizations and companies will plant a real tree in a desert area of China. And now it seems that the country's efforts as a whole to make a greener world have paid off.

According to a study by NASA, China and India are the main reasons for making the Earth greener over the past twenty years. The study has found that since 2000 the Earth's green leaf area has increased by 5 percent, or over 5 million square kilometers. The increased green leaf area is as large as that of the Amazon rainforest. It is mainly the result of big trees-planting programs in China and intensive agriculture (集约型农业) in both countries, according to NASA. China and India take up one third of the increased greening, but is only 9 percent of the planet's land area covered in vegetation.

China played the most important role in the increase of the green land, adding 25 percent to this increase, while India added 6.8 percent. Over the past years, China has made great efforts to green the land. In 1978, China began a nation-wide forestation project–the Three North Shelterbelt Forest Program, also known as the" Great Green Wall". The program has seen many trees planted in 13 provinces and autonomous regions such as Tibet and Inner Mongolia in northern China to act as windbreak. By the end of 2017, the forest coverage rate among the areas of the project had reached 13.57 percent, compared to 5.05 percent 40 years ago.

Because of China's success in dealing with desertification (沙漠化), the United Nations Environment Program (UNEP) believes the country is a good example for others to follow. China is one of the most successful countries in greening the desert and has lessons to share with the world.

【推荐3】We all know that animals are better at some things than humans, and we can usually explain why animals can do some things better than us. One of the natural abilities many animals have is their homing instinct, which can help them find their homes. These animals such as pigeons(鸽子), bees, frogs and cats are able to find their way home, sometimes making journeys of hundreds of kilometers back home. In our daily life, humans can make use of an animal's homing instinct. Pigeons, for example, have been used to send information or carry letters in times of war. Today some people train their pigeons and take part in pigeon races as a hobby.

There are many interesting stories of the homing instinct at work. In the USA, a cat traveled 1,360 kilometers back to its old home after the owners moved, taking nearly a year over the journey. When we lose our kitten, we usually find her again near the house where she was born. We have a pool in the garden where the frogs come back every year. I even heard a dog which was hurt by a car managed to take itself to the house. There are other wonderful stories about the homing instinct. But how do these animals find their way home?

They can't read maps and, as we know, they can't ask each other for directions. It seems that some animals use their sense of smell to take them back to the place where they were born. Other animals such as birds and bees may use the sun, the stars and the moon to help them find their way. Scientists believe that some animals have special things in their brain which help them to find their way. As for cats, nobody really knows how their homing instinct works and I am sure-cats are never going to tell us their secrets.

【推荐1】If you look at the top of your phone, you’ll usually see a little symbol that says 3G or 4G. The “G” stands for the “generation” of your mobile network. But these symbols will become things of the past after 5G networks fully arrive.

On March 30, Shanghai vice-mayor Wu Qing made the first 5G video call on a Huawei Mate X smartphone, CGTN reported. Shanghai has also become the first city in China to start testing 5G networks.

About 100 times faster than 4G networks, 5G will let people download and upload data faster than ever before. But 5G won’t just bring faster mobile internet. People can use it for many other things as well.

For example, 5G will help to make self-driving cars safer. Today’s self-driving test cars have one problem—lag. When the car “sees” an obstacle(障碍物), it sends this information to a data center and receive instructions.

However, it takes time to send and receive this information. With this kind of lag, the cars might crash(碰撞) because they don’t receive instructions in time. With 5G, this lag will be greatly lowered, making the cars safer, according to CNN.

5G could also be used to power the Internet of things (IoT物联网). This refers to a large online network that connects all things and people. Fast internet speeds will be the key to developing this technology.

The IoT could be used in a lot of ways. For example, with IoT, your refrigerator could automatically(自动地) place an order online for eggs when it finds that there are no eggs left inside.

【推荐2】5G technology would be widely used by 2020, causing some experts to say the “5G epoch” is coming. Yet, when reporting about 5G, many reporters only described it as a “much faster” technology than 4G. As a result, what people know about 5G is that they could “download a movie within one second”.

Actually, 5G technology has many more advantages than 4G besides the speed. It can be used for at least two purposes—for connecting everything and removing delays (消除网络延时).

Connecting everything is one of the strongest functions of 5G. It makes the Internet Things possible. Take driverless smart cars as an example. 5G technology can connect all parts of a transportation system including traffic lights, CCTV cameras and cars to build up perfect coordination (协调). In this way, these cars can avoid obstacles (障碍) and move on driving routes, which will help improve self-driving technology. And removing delays might be useful especially in online games. Factories can produce more macro base stations to allow more people to use. The more users, the lower cost. Therefore, 5G technology won’t cost as much as they thought.

【推荐3】5G is coming. 5G is the 5th generation(代) network. It is a new network after 1 G, 2 G, 3 G and 4G. It can connect everyone and everything together. 5G networks will cover many cities in China soon. 5G means super-fast data speed. One can download a two-hour movie for fewer than 10 seconds, and it is making our lives more and more convenient.

5G will make self-driving cars possible. For safety, self-driving cars need super-fast data transmission(传输) to communicate with their nearby environment. 5G is just what makes self-driving cars achieve(达到) this. Even airplanes will become “smart” in the near future. Passengers will be able to use 5G networks in the air to connect to the Internet and can order for food and drinks.

5G will be a big help for students who take online classes. Many people live in poor areas.in the world where there are no schools. But with 5G, this will change. Students all over the world will be able to see places like the Great Wall without leaving their rooms.

It will be also easier for doctors to treat patients remotely by 5G. It means caring for patients from far away.

The facts listed above are only a part of what is 5G. With 5G, many things do not seem like dreams anymore. Now let’s welcome the coming of 5G.