Earlier this year, China achieved a new milestone(里程碑) in space exploration(探索). On Jan 3, Chang'e 4 became the first space probe(探测器) in history to land on the far side of the moon, People's Daily reported.
    From Earth, we can only see one side of the moon. The other side has been a mystery. Scientists have long wondered what lies on this side of the moon.

    Chang'e 4 has sent back photos of the far side of the moon. It is also used to carry out experiments, such as growing seeds in a low-gravity(低重力) environment. The data(数据) collected from these experiments could be used to help us build a base on the moon in the future.

    The success of the Chang'e 4 mission(任务) is a main achievement for China's space program. It marks a new stage in China's deep space exploration, said Wu Yanhua, head of China National Space Administration.

    China launched(启动) its lunar(月球的) exploration program in 2004, naming it Chang'e. Chinese scientists set three goals —“orbiting(环绕运行), landing and sample(样本) returning”— referring to launching probes that could circle around the moon, touch down on its surface and bring lunar materials back to Earth.

    Chang'e 4 has realized the goal of landing. The third will be achieved during the Chang'e 5 mission, which is set to take place before the end of this year, China Daily reported.

    Following the success of the Chang'e missions, Chinese scientists are looking even farther into our solar system (太阳系). China's first Mars(火星) mission is expected to be carried out by 2020, Wu said.

    A new camera made by a company named Netatmo has facial recognition software (人脸识别系统) that can tell parents at work that their children have returned from school, or that a package (包裹) has been taken to their home. It can also tell them if a stranger has entered their home.

    Janina Mattausch is a product marketing manager for Netatmo.

    "The common security (安全) cameras at present are not that smart. So, they can tell you if something is moving but they don't necessarily know if it's a human being or, ah, if it's your kid- they don't know the difference, so they will warn (警告) you all the time."

    When family members enter a home, the new camera "recognizes" (识别) them and sends information to the owner's smartphone. The owner can choose to see the video then or later. But if an unknown person enters a home, the camera will send the owner a warning that will cause an alarm to sound on the owner's smartphone.

    That is what happened recently to a smart home camera owner named Damien. He lives in Paris.

    "On a Friday I was at work, attending a big monthly meeting when my phone warned. At first I told myself 'Oh, it must be a mistake, maybe I have to set the system again.' —but the notice on my phone was telling me that there was a movement in my flat and also a face that the software did not recognize."

    He watched the video and was very surprised by what he saw.

    "I saw a person I did not know with his shoes on. I was watching it live on video. So I felt totally unbelievable, frozen. I asked a workmate to take me back home as fast as possible and I called the police on the way."

    With the help of the video, the police found the intruder (闯入者) later that day.

The ISS is as tall as a nine﹣story building and weighs 186，900 kilograms. It's about the size of two football fields and flies about 400 kilometers above our heads at 28，970 kilometers per hour. It goes around Earth once every 90 minutes. 

If you watch the sky for about an hour after the sun goes down，you may see some "moving stars". But they are not really stars. They are man﹣made satellites. And the biggest of all is the International Space Station （ISS）. From May to July is the best season to watch the ISS flying over the earth. And people can see it with their eyes during the time. 

The scientists want to live on the ISS. They think that the best way to learn more about space is to live there. 

When the space station is finished，it will be like a city in space. People will stay and study there with many of the thing they have at home. Laboratories，living rooms and power stations are being built. The ISS is the most ambitious（雄心勃勃的）

Scientists hope that the ISS will be a stepping stone（跳板） for future space exploration. "The ISS will be more useful some day. The ISS will help us understand the human body better，explore space and study the earth. It can help us make life on the earth better. " said Kathryn Clark

Sixteen countries are part of the space program：the US，Russia，Canada，Brazil，and 11 European countries. 

China isn't an ISS country，but it has helped with some of the experiments. In 2003，China sent some rice up to the ISS to find out what space would do to it. 

After it's finished，more than 90 percent of the world's population is able to see the Space Station. So keep looking up，and maybe you'll see it getting bigger. 

My hometown Nanjing is in the eastern part of China.As the capital of Jiangsu，it is a modern and busy city.And it is one of the cities with the longest history in China.With the development of the economy（经济），it has changed a lot in the past few years.

For one thing, people took tramcars (有轨电车) to go out in the past. But now many people choose to take a subway because of its convenience (便捷). What's more, taking a taxi becomes very popular. It has an app on the phone, and some people use it to call a taxi. It may be much cheaper.

Besides，the building is different from the past.In the past，the tallest building in Nanjing was Jinling Hotel.It had 37 floors.At that time，the tallest building is Zifeng Tower.It has 78 floors.Different from the past，you can see tall buildings everywhere in Nanjing.

As for the environment，in the 1980s and before，Nanjing was full of trees，people paid little attention to the importance of plants and fresh air.Plants were cut down and the air got worse. Now, to improve the living place, people take all actions to grow plants and cut down pollution. The environment is getting better now.

Poems for Children is a book of poems. These poems were chosen by the poet Julie Waters and they carry children on a wonderful journey of poetry.

The book contains 50 poems which were written by poets from many different countries. There are poems old and new from W.B. Yeats. Robert Louis Stevenson, Waller de la 'Mare and many other famous poets around the world. You can find poems about joy, humour, beauty and mystery.

This book is a treasure because Waters has chosen some really fine poems. There are short ones like The Parkby James S. Tippett and Until I saw the sea by Lilian Moore, together with longer ones like Kept Busy by Joanne Bums and The Explosion by Philip Larkin. They create wonderful images in the reader's mind and tell a story. Children can learn how beautiful and musical the English language can be when they read the poems aloud.

Another part of the book which makes it attractive is Charlotte Green's introduction. It teaches children how to read and appreciate （欣赏）poems. Green uses simple words so children can understand them easily. This is a must- read for both beginners and advanced learners of poetry.