Artificial intelligence (AI, 人工智能) can help us make phone calls. It can guide us to where we want to go. It can play games. And now, AI can do even more things.

    Researchers from Microsoft have created the first machine translation system that can translate news articles from Chinese to English, Business Standard reported.

    According to Microsoft's official website, researchers tested the system by asking it to translate hundreds of sentences taken from news stories. Then, language experts compared the results to two translations that were done by humans. The experts concluded that the system's translations were as good as the human translations.

    Machine translation is always challenging. This is partly because different words can be used to express the same meaning. It can be hard to say which word is more “correct”.

    Experts used several methods to improve the system's translation abilities. “Much of our research is really inspired (得到启发) by how we humans do things,” lead researcher Liu Tieyan said.

    One method is called dual learning. In this method, the system translates every sentence from Chinese to English, as well as translates the sentences back from English into Chinese. This way, the system can improve itself and learn from its own mistakes. This is similar to what humans do to make sure their translations are accurate (准确的).

    Another method makes use of deliberation networks . The researchers taught the system to repeat the process of translating the same sentence over and over. Gradually, the system can improve the quality of its translations. This is similar to how people revise their own writing by going through it again and again.

    Did you spend much time lying on the comfortable sofa at home during the summer vacation? How often did you do sports this summer? People across the world need to get moving, according to a new study by the World Health Organization (世界卫生组织).

    5% of adults do not get enough exercise, according to the study. This number hasn't changed from 2001. Because of this, about 1.4 billion people are close to deadly diseases (疾病) such as heart disease and cancer (癌症).

    People should do at least 2 and a half hours of "moderate intensity (中等强度)" exercise each week, such as dancing or swimming. They can also do 75 minutes of "vigorous intensity (高强度)" exercise, such as running or playing soccer, according to the WHO.

    As for how to exercise more, experts says that we don't have to go to the gym (健身房) every time For example, we can go up and down stairs (楼梯) a lot instead of taking the lift. If we can't go to a dancing class each week, standing on one leg for 30 seconds a day is very good too.

    The study also found that women are less active than men, 32% of women hardly ever take exercise, compared to (比较) 23% of men. Women spend more time at home taking care of children and doing housework.

    But unlike that in most other countries, men are less active than women in China, with 16.6% of men and 12% of women not getting enough exercise.

Mr. and Mrs. Wu {#blank#}1{#/blank#}that their son can learn about the importance of study. They {#blank#}2{#/blank#}him a bright future but they know that they can't {#blank#}3{#/blank#}his son to change his old habits in one day.

When someone does an eyebrow flash (挑眉), you'll see their eyebrows raise lightly for less than 1/5 of a second. 

What it Means: The eyebrow raise is a great sign of interest. People usually use the eyebrow flash in three main ways: 

* The eyebrow flash can skillfully show interest, such as when agreeing to something or thanking someone. It often means "yes" during a conversation. 

* The eyebrow flash can also express interest in a loving way. 

* Or the eyebrow flash can show social interest, such as when two people meet each other. It shows the other person that you are happy to see them. 

Whenever we use the eyebrow flash, we attract people's attention to our face. Teachers and speakers often use it to say, "Listen to this!" or "Look at me!"

The Science: According to a study, the eyebrow flash is thought to be a form of greeting and can be found all over the world. It is said that this gesture is common across all cultures. 

How to Use it: There are many ways to use the eyebrow flash. Here are a few examples: 

* To Express Liking: When you see someone you like or who you want to like you, give them a quick eyebrow flash followed by a warm smile. 

* To Encourage Participation: If you want someone to listen to something you are going to say, raise your eyebrows right before speaking. 

* To Show Interest: Are you curious (好奇)? Your eyebrows are the best way to express it!

The World Wide Fund for Nature（WWF）was set up in 1961 as an important organization.It has held n {#blank#}1{#/blank#}1，300 projects to protect wild animals in more than 100 countries，including China.

For example，South China tigers are in d {#blank#}2{#/blank#}.That's because they are losing their homes and are hunted by people.It c {#blank#}3{#/blank#}the number of South China tigers to drop down.So the WWF has organized some activities to support China in stopping the hunting of South China tigers.Another main threat（威胁） to these animals is the wrong buying and selling of wild animals.It is c {#blank#}4{#/blank#}to kill and sell these animals.

Thankfully，the WWF works closely with China to protect wild animals.It has worked hard to a {#blank#}5{#/blank#}people's attention to the importance of protecting wildlife.

When I was a student in France，a local friend invited me to have lunch at her home. During the meal，I found all her family had their hands on the table，except me. Later I learned that it's impolite to put your hands under the table. 

—Tom

When I was a student in the UK，I went to a pub with two local friends. We all had a drink and I drank mine quickly. My friends still had half﹣full glasses so I bought another drink，just for myself. My friends said，"You can't do that. When in a pub in the UK，you should buy drinks for you and your friends. "I was so embarrassed（尴尬的）. 

—Henry

I spent a year studying in Germany. I was shocked the first time I went to a lecture（讲座）. At the end of the lecture，all the students started knocking on their desks. How strange!A student told me that in Germany，students don't clap their hands（拍手）to show they like something. They knock on their desks instead. 

—Lily

I love making birthday cards. One day，when I was a student in South Korea，I made a birthday card for a local friend. But when I gave the card to her，she cried，"My name is written in red ink（墨水）!"She said in South Korea，a name written in red ink means that the person has died. 

—Mary