The concept of good manners varies a lot when we compare different cultures, values and ways of living. However, when we talk about the western part of the world, the differences are not so big. In my opinion, going to a restaurant in Brazil will rarely be an embarrassing situation. But there are some basic and necessary rules of etiquette(礼节)that Brazilians usually respect every day. They are:

    ●Being on time is polite, but it is not a strict rule in Brazil. Being late for up to 15 minutes probably will not make a Brazilian angry.

    ●When you go to a restaurant, be careful to greet the people who work at the place, and don't forget to greet the people who are already waiting for you at the table. It's not necessary to hug or kiss everybody if they are already seated.

    ●You can ask somebody about how the food is prepared and also about prices or tips if you are not sure about them.

    ●Before they start eating, Brazilians usually say “born appetite” to their friend.

    ●You should never talk to another person while you still have some food in your mouth.

    ●Making noise while eating is also considered really rude. Avoid doing it.

    ●Be careful not to put your elbows on the table while eating. It is not terrible, but it can be considered a little bit rude by some people.

    ●Don't worry about the time. Usually people in Brazil stay seated for a long time, especially when they have interesting things to talk about.

    ●It's not necessary to talk in a really low voice because people there usually talk in a little loud voice. But please, don't exaggerate.

    ●Finally, saying “thank you” and “bye” are always seen in Brazil.

    An 18-year-old US girl gained unexpected appreciation and a surprise after she gave “extra help” to an elderly man in the restaurant she was working.

    It's social media that made her seemingly small action go viral and brought her appreciation from hundreds of thousands of strangers and a scholarship to Texas Southern University.

    The heroine Evoni Williams has reportedly been working full-time to earn money for further study in a restaurant in La Marque, Texas，the United States. It was last week when an old man named Adrian Charpentier asked for help to chop his ham for his hands were weak because of illness. On that busy morning when she had loads of work on shoulder, Williams helped the man without hesitation. The moment she was leaning over the counter and cutting the ham was shot by a customer known as Laura Wolf.

    Wolf posted the picture on the Internet and wrote, “I'm thankful to have seen this act of kindness and caring at the start of my day while everything in this world seems so negative. If we could all be like this waitress and take time to offer a helping hand…” According to local reports, Wolf didn't know Williams, neither did Williams know her act was shot and shared on the web. However, the small act of kindness soon accumulated its own power on and outside the Internet.

    Besides praise from netizens and media reports across the United States, a 16000-dollar scholarship to Texas Southern University was recently granted to Williams to support her study plan on business management.

    “We wanted to reward Evoni's act of kindness and let her know that good deeds do not go unnoticed,” said Melinda Spaulding, an administrator at Texas Southern University.

    Ladies and Gentlemen, thank you. Well, ni­hao. (Laughter) It is such a pleasure and an honor to be here with all of you at this great university, so thank you so much for having me. I'm here today because I know that our future depends on connections like these among young people like you across the world.

    That's why when my husband and I travel abroad, we don't just visit palaces and parliaments(国会) and meet with heads of countries. We also come to schools like this one to meet with students like you, because we believe that relationships between countries aren't just about relationships between governments or leaders—they're about relationships between people, particularly young people. So we view study abroad programs not just as an educational chance for students, but also as an active part of America's foreign policy.

    Through the wonders of modern technology, our world is more connected than ever before. Ideas can cross oceans with the click of a mouse. Companies can do business and compete with companies across the world. And we can text, email, Skype with people in the world.

    So studying abroad isn't just a fun way to spend a time of learning; it is quickly becoming the key to success in our times. Because getting ahead in today's workplaces isn't just about getting good grades or test scores in school, which are important. It's also about having real experience with the world beyond your borders­experience with languages, cultures and societies very different from your own. Or, as the Chinese saying goes: “It is better to travel ten thousand miles than to read ten thousand books.”

    With their furry round heads and big black eyes, Zhongzhong and Huahua look just the same as any other monkey. But they happen to be the world's first cloned (克隆的) monkeys.

    Years ago, scientists used cloning techniques to produce Dolly, the world's first cloned mammal (哺乳动物).They now used the same technique to produce the monkeys in China.

    In animal cloning, animals are produced in a lab by using DNA that is taken from the cells (细胞) of a naturally-born animal. To clone Zhongzhong and Huahua, scientists from the Chinese Academy of Sciences (CAS.中国科学院) first removed the nucleus (细胞核) from a monkey's egg cell (卵细胞). They then put another nucleus taken from the monkey's body cells into the egg cell. The newly-formed egg was put into the womb (子宫) of a female monkey. Finally, Zhongzhong and Huahua were born.

    The cloning process is hard, especially removing nucleus. It needs to be done in a fast and precise (精确的) way. The faster you do it, the less damage is done to the egg, according to CAS. Scientist Liu Zhen spent three years practicing removing the nucleus.

    Unlike common monkeys, cloned monkeys have the same DNA as each other. When doing experiments on them, scientists can easily know that certain results are caused by different treatments, rather than different genes.

    According to Sun Qiang from CAS, most drug trials (药物试验) are done on lab mice. However, drugs that work on mice might not work on humans. The two species are very different.

    "Monkeys and humans are much closely related and testing on monkeys is supposed to be as effective (有效的) as testing on humans," Sun added.

    The Eiffel Tower is very famous in France. It is visited by 7 million visitors a year. The Eiffel Tower was designed by Gustave Eiffel in the late 19th century. On Monday, March 31st, 2019, it turned 130.

    The look of the Eiffel Tower is greatly loved by people today, but things were different when the design was first shown to the public. Many French artists thought that the design was ugly. However, Eiffel did not change a thing. He believed that once it was completed, people in Paris and visitors around the world would love the tower. He was certainly right.

    The tower became popular with the public as soon as it opened on March 31st, 1889, two years after the construction began. Over 3,000 people came to look at this new tower and even made the effort to climb the 1,710 stairs to the top. The 984-foot-tall Chrysler Building in New York City beat it.

    Today, the tower houses a number of restaurants on its first and second levels. The third level has been turned into a vast platform (平台). From there visitors can see the entire city of Paris. While visitors are allowed to take the stairs to the first two levels, the platform can only be got to by taking the elevators.

    To ensure that the “Iron Lady” always looks good, the tower is cleaned and repainted every eight years. It's an effort that takes a team of 25 workers, an entire year. If you travel to Paris one day, don't miss it, the excellent achievement.

    Everybody seeks happiness in the world. We will be really happy when we get a new car or a big house or get married... The thing is, if we are continually searching for happiness in the outside world, we will be very disappointed. It seems as if we are forever chasing it and it is always just one step away.

    Happiness is a short state of mind, just like the state of sadness or joy or anger. It would not be possible for us to be in a happy state 24 hours a day. If you think that sounds laughable, think about being at a funeral when everyone is mourning. Would it feel right to go about with a huge smile on your face?

    What we go through in our lives helps us grow and understand the value of happiness. We need to be able to respond in all manner of ways according to what we are dealing with at any given time. All emotions and states are part of the life.

    Happiness can be found in reaching out and being in relationship with people. Though time or money may be lost in helping others, these will become our happy memories. Happiness is a dance with whatever in front of you. It is a deep connection to everything around you. It does not come from expecting others to bring you joy but from how you can create joy for others.

    If you want to experience happiness more often, see what you can do to put a smile on someone else's face each day and notice how much happier you feel when you have achieved that. Happiness is not to be found in material possessions. It is freely available to everyone at any time. All that is required to experience happiness is that you place your focus on moments in your life that make you smile.