People who do not get enough vitamin A in their diet may develop night blindness. But in the developing world, a lack of vitamin A causes much more serious harm to children. The world Health Organization links the lack of vitamin A to as many as 250,000 child deaths every year.

    One excellent source of vitamin A is found in newly developed sweet potatoes with orange flesh. Orange sweet potatoes contain high levels of beta-carotene, which the body changes into vitamin A. Experts say orange sweet potatoes could help the Africans who are lacking in vitamin A. But, first, more people will need to be persuaded to eat them. Sweet potatoes need a better image in Africa. Jan Low with the International Potato Center says, “We do have an image problem with sweet potatoes. In many African countries, they are seen as a crop of the poor.”

    Ms. Low explains that sweet potatoes are mainly grown by poor women to feed their families in case another crop fails. The sweet potatoes commonly grown in Africa have white or yellow flesh. But they are low in vitamin A.

    Jan Low took part in a project to study how to market orange sweet potatoes to Africans best. She worked on an information campaign(活动) in Mozambique and Uganda. The campaign included radio messages about the nutritional(营养的) benefits of the orange sweet potato. They advertised its ability to “fight diseases, make you strong, clear you skin and make you look healthy”. In areas without radio, the campaigners spread the message through theater. The performances included singing, dancing and storytelling. And everywhere they went, the campaigners wore orange T-shirts and hats. They even drove orange cars.

    Dan Gustafson heads the Washington office of the United Nations Food and Agriculture Organization. He mentions the efforts in the past to increase the popularity of other nutritious crops. He says most of these efforts failed because organizers of the campaigns did not consider what people wanted to eat. People want to eat what they are familiar with. But Mr. Gustafson sees a better chance for the efforts to increase the popularity of the orange sweet potato in Africa. Except for the color, the orange sweet potato is almost the same as what people already eat. Dan Gustafson says, “I think this time the campaigners will succeed, because they have made enough advertisements and the difference between the vegetable they have advertised and what people already eat is not a radical one.”

    A Hobby is a regular activity that is done for enjoyment, typically during one's leisure（闲暇的） time. By continually taking part in a particular hobby, one can acquire practical skill and knowledge in that area. Is travel a good hobby? Travel, in the youngest sort, is a part of education and, in the elder, a part of experience. Some may think otherwise. To them, visiting churches, castles, libraries, etc. is an absolute wastage of time. They may further say that one can read the account of these or see the films of the important places of the world. They forget that touch of actuality gives a different type of sensation and satisfaction.

    Travelling may be an expensive hobby but it makes up for the financial loss. If a traveller has interest in life and its manifestations（表现）, one can find much to keep oneself absorbed and happy. A student of any stream can definitely find something of his own interest and studies. One can definitely find everything that satisfies his cravings for knowledge and feelings.

    As a hobby, travelling keeps us busy during leisure time; it is the best method to make use of time. Till a person breaks from dull routine, physically and mentally, one cannot find satisfaction. Travelling helps us to achieve this break. At a new place, one is curious to know and eager to gather all the unknown information about the place which he has neither read nor heard before and he gets thrills and surprises which keep the interest and enthusiasm alive and encourage us to keep our journey on.

    While travelling, one comes across a number of people from varied backgrounds and places. By interacting with them, he comes to know about their traditions also. In case one has psychological bent of mind, one increases one's experience and power to understand others. Understanding human nature is, perhaps, the best part of education. Travelling satisfies all demands of a good hobby-it is absorbing education and refreshment to the mind, body and soul.

    Do you know of anyone who uses the truth to deceive(欺骗)?When someone tells you something that is true, but leaves out important information that should be included, he can give you a false(假的) picture.

    For example, someone might say, ''I just won a hundred dollars on the lottery(彩票). It was great. I took that dollar ticket back to the store and turned it in for one hundred dollars!"

    This guy's a winner, right? Maybe, maybe not. We then discover that he bought $200 worth of tickets, and only one was a winner. He's really a big loser!

    He didn't say anything that was false, but he left out important information on purpose. That's called a half-truth. Half truths are not technically lies, but they are just as dishonest.

    Some politicians often use this trick. Let's say that during Governor Smith's last term, her state lost one million jobs and gained three million jobs. Then she seeks another term. One of her opponents says, “During Governor Smith's term， the state lost one million jobs!” That's true. However, an honest statement would have been, “During Governor Smith's term, the state had a net gain of two million jobs.”

    Advertisers will sometimes use half-truths. It's against the law to make false statements so they try to mislead you with the truth. An advertisement might say, “Nine out of ten doctors advised their patients to take Yucky Pills to cure toothache.”' It fails to mention that they only asked ten doctors and nine of them work for the Yucky Company.

    This kind of deception happens too often. It's a sad fact of life: Lies are lies, and sometimes the truth can lie as well.

The Peony Culture Festival of Luoyang

    Spring is time for people to go out and see blossoming flowers. Luoyang in Henan, China is famous for peonies, the city's official flower. The city's annual Peony Culture Festival begins in early April and lasts till early May. Peonies are in full bloom during the event, which was first held in 1983.

    You can go to the Luoyang National Peony Garden. The peonies there are known for their rich colors and long florescence. Don't miss the 1,600-year-old "Peony King"!

    Chinese Language Day

    Chinese is one of the six official working languages of the United Nations. The LIN has set different days for these languages to promote their uses. It holds exhibitions, shows and other activities. In 2010, the first Chinese Language Day was held on Nov. 12. But since 2011, it has been held on April 20. The date is close to Grain Rain, one of the 24 solar terms. It means "rain of millet". People celebrate Grain Rain to remember Cangjie, a mythical character. Many people believe that Cangjie was the first person to write Chinese characters. When he did this, it rained millet and saved people from hunger.

    China Astronautics Day

    On April 24, 1970, China's first man-made Earth satellite — Dongfanghong I — went into space. It was a big step for China's space program. In 2016, the government set April 24 as China Astronautics Day. Many events are held across the country to celebrate this special day. For example, astronauts and scientists will give talks to students. Some cities will hold exhibitions about space development.

    Last year, China had big plans for its space program. On December 8, it launched its second lunar rover（月球车）as part of the Chang'e 4 space mission, which landed on the far side of the moon.

    There is an old Chinese proverb that states "One generation plants the trees; another gets the shade," and this is how it should be with mothers and daughters. The relationship between a mother and a daughter is sometimes confusing. The relationship can be similar to friendship. However, the mother and daughter relationship has unique characteristics that distinguish it from a friendship. These characteristics include a hierarchy (等级) of responsibilities and unconditional love, which preclude mothers and daughters from being best friends.

    Marina, 27 years old, said, "I love spending time with my mom, but I wouldn't consider her my best friend. Best friends don't pay for your wedding. Best friends don't remind you how they carried you in their body and gave you life! Best friend: don't tell you how wise they are because they have been alive at least 20 years longer than you." This doesn't mean that the mother and daughter relationship can't be very close and satisfying.

    While some adult relationships are still troubled, many find them to be extremely rewarding. This generation of mothers and adult daughters has a lot in common, which increases the likelihood of shared companionship. Mothers and daughters have always shared the common experience of being homemakers, responsible for maintaining and passing on family values and traditions. Today contemporary mothers and daughters also share the experience of the workforce and technology, which may bring them even closer together.

    Best friends may or may not continue to be best friends, but for better or worse, the mother and daughter relationship is permanent, even if for some unfortunate reason they aren't speaking. The mother and child relationship is closer than any other. There is not an equal relationship. Daughters should not feel responsible for their mother's emotional well-being. It isn't that they don't care deeply about their mothers. It's just that they shouldn't be burdened with their mother's well-being.

    The mother and daughter relationship is a relationship that is not replaceable by any other. Mothers never stop being mothers, which includes frequently wanting to protect their daughters and often feeling responsible for their happiness. Mothers always "trump (胜过)" friends.

    Sales of Apple's new iPhone 11 in China began on Friday, but were met with a cooler reception from consumers than in previous years. Unlike in previous years, no long lines were seen outside Chinese shops on Friday for the new iPhone, and the product release only made the headlines in a few media outlets.

    Huawei unveiled(公布)its Mate 30 smartphone series on Thursday night. Its new devices have won consumers' hearts at home and abroad. Many compared it with Apple's new iPhone 11, saying that beats the new iPhone in terms of innovation and quality. One customer surnamed Zhao, an IT specialist who pre-ordered a Mate 30 Pro on Friday, said that he chose Mate 30 without hesitation. Zhao said, "It's obvious that Huawei's new phone with its advanced 5G mode would lead the future global telecommunication market, and its new innovative features in gesture and side control attracted my attention, too."

    In contrast with iPhone 11's lukewarm(冷淡的)sales, Chinese netizens have engaged in discussions on Mate 30 and Mate 30 Pro. An online poll on the Mate 30 and iPhone 11 on Weibo on Friday showed that more than 60 percent of netizens chose the Mate 30, while less than 20 percent chose the iPhone 11. Many chose Huawei not out of patriotism (爱国主义)but for its technology.

    Overseas consumers also engaged in active discussions on Huawei's new flagship devices on technology sites and social media platforms. On Twitter, many netizens said "nice", "best phone ever" and "my favorite one" on Huawei's Twitter account. Some netizens in countries like the UK, the Netherlands and Argentina asked when Huawei's new devices would be released in their countries.