Recordings of angry bees are enough to send big, tough African elephants running away, a new study says. Beehives (蜂窝)—either recorded or real—may even prevent elephants from damaging farmer's crops.

    In 2002, scientist Lucy King and her team found that elephants avoid certain trees with bees living in them. Today, Lucy wants to see if African honeybees might discourage elephants from eating crops. But before she asked farmer to go to the trouble of setting up beehives on their farms, she needed to find out if the bees would scare elephants away.

    Lucy found a wild beehive inside a tree in northern Kenya and set up a recorder. Then she threw a stone into the beehive, which burst into life. Lucy and her assistant hid in their car until the angry bees had calmed down. Next，Lucy searched out elephant families in Samburu National Reserve in northern Kenya and put a speaker in a tree close to each family.

    From a distance, Lucy switched on the pre-recorded sound of angry bees while at the same time recording the elephants with a video camera. Half the elephant groups left the area within ten seconds. Out of a total of 17 groups, only one group ignored the sound of the angry bees. Lucy reported that all the young elephants immediately ran to their mothers to hide under them. When Lucy played the sound of a waterfall (瀑布) instead of the angry bees to many of the same elephant families, the animals were undisturbed. Even after four minutes, most of the groups stayed in one place.

    Lucy is now studying whether the elephants will continue to avoid the sound of angry bees after hearing it several times. She hasn't tested enough groups yet to know, but her initial (最初的) results were promising enough to begin trials with farmers. She has now begun placing speakers in the fields to see if elephants are frightened away.

    Writing it down

    Unlike some other European languages, English is a little tricky when it comes to writing. How a word is pronounced and how it is actually spelt can be very different things.

    Same spelling, different meanings

Imagine, then, a situation where two words are spelt and pronounced exactly the same way, but have completely different meanings. Welcome to the world of homonyms（同形同音异义词）. Take, for example, the word "fair"—it can be a kind of festival, an adjective to describe the colour of your hair or how you should play a game. Or "leg", which can be attached to a person, or a table and can also be a distance you travel, or a part of a competition.

Don't take it literally（字面意思）

So how do you know which meaning someone is referring to? You don't, except by the context. Obviously, if someone asks you to "give them a hand", they don't want you to remove what is at the end of your arm.

What's in a name?

    Sometimes even the context doesn't help much—the result can be amusing. These sentences play with the double meaning of a noun:

    Sentence 1: I used to be a banker, but I lost interest.

Sentence 2: A small boy swallowed some coins and had to go to hospital. When his grandmother phoned to ask how he was, the nurse said: "No change yet".

    More ambiguity（歧义）

    Sentence 3 plays with the different meanings of a verb:

    Sentence 3: I wondered why the ball was getting bigger. Then it hit me.

Double trouble

    And sometimes a word can be a noun and a verb, but have different meanings. Can you work this one out?

    Sentence 4: Time flies like an arrow. Fruit flies like a banana.

    If you like these homonyms, you will be pleased to know that English has plenty more!

    China is using travel as an important tool to help strengthen its economy. At the recent First World Conference on Tourism a Chinese official spoke about the government's plan for using tourists and the money they spend. The head of China's National Tourism Administration, Li Jinzao, said that China plans to send 150 million travelers along what he called the “One Belt, One Road”. In the next five years, these tourists are expected to spend $200 billion, he said. This spending estimate is likely to raise expectations among countries along the ancient Silk Road, which links China to its neighbors.

    China has reasons to feel it can use tourism to influence the foreign policy. Governments across the world are changing their immigration(移民) rules to welcome the growing numbers of Chinese tourists. Chinese citizens are now going to places where in the past Chinese rarely went. Marketing expert Michel Gutsatz said that among Chinese travelers, South Korea and Thailand are popular destinations. Outside of Asia, he said, Chinese are more likely to visit Europe than North America. These changes, he said, are the results of young Chinese travelers, who spend more and travel independently.

    Spending by Chinese tourists has lifted the economies of several Asian countries, including Thailand, Malaysia and Vietnam. It is expected that the number of Chinese traveling overseas to reach 242 million by 2024. In a single year, that number would be equal to the total number of tourists received by Germany, Iran, Indonesia and Egypt combined.

    China is now the biggest business travel market in the world. The Global Business Travel Association (GBTA) recently announced that China has overtaken the United States in business travel. Chinese spent just over $290 billion. This year, GBTA predicts that the Chinese business travel market will grow over 10 percent, while the US business travel market will grow less than 2 percent.

    Sports can help us a lot. Taking exercises can make us strong. In collective（集体的）sports like basketball, volleyball or football, we will learn the importance of cooperation(合作). And sports can also help us relax after work or study.

    However, as the saying goes, “there are two sides of everything.” Sometimes we may hurt other players or ourselves if we are not careful enough when participating(参加) in sports activities. What's more, too much or hard practice can be bad for our health.

    Sports can make us healthy both physically and psychologically(心理地). It is also a good way for people to know each other and can improve friendship between people. So long as we are careful enough, sports can do us nothing but good.

    People in South Korea who feel they can no longer bear the stress of everyday life now can choose to stay in a prison to relax and think deeply.

    In a society where pressure to do well in school and find highly-paid jobs is intense, a former lawyer came up with an extreme relaxation idea. Kwon Yong-seok created the "Prison Inside Me" —a stress-reduction center with a punishment theme. People come here to cut themselves off from the outside world and pay to be kept in 60-square-foot (5.6-square-meter) cells (囚室).

    Located on the outskirts of Hongcheon, about 58 miles (93 km) northeast of Seoul," Prison Inside Me" came to life after Mr. Kwon voluntarily asked to spend time behind bars for" healing reasons," but his request was turned down." I didn't know how to stop working back then," he said." I felt like I was being swept away against my will, and it seemed I couldn't control my own life." So, Kwon and his wife Roh Ji-hyang decided to take matters into their own hands, and designed and built a prison-like spiritual center. The construction was completed in June last year and cost about 2 billion won ($19 million).

    The facility includes 28 cells, furnished with only a toilet, a sink and a small table, where guests can spend time alone, thinking about life and enjoying private thinking periods. Moreover, guests can also join group thinking periods in the hall, where they are given instructions on how to free themselves from what Mr. Kwon calls the "inner prison" to find inner peace.

    According to the Wall Street Journal, hundreds of stressed South Koreans are checking in at the stress-reduction facility to think about their lives and regain control of it. A two-night stay at" Prison Inside Me" costs 150,000 won ($146).

    Mr. Kwon and his wife explained that at the beginning they had a different plan for the" relaxation center," and imagined a longer stay for their guests, but, given that people weren't able to take more time off, they had to reduce the length of stays to just two days.

    Park Woo-sub, a guest at" Prison Inside Me," said the experience helped him a lot." This is my third time in prison. Being kept in a prison makes me hard to breathe, but it also offers time to focus only on me and spend some quiet time with myself."

    Others said the experience would have been more helpful if the conditions had been poorer, like in a real prison.

    A Russian spacecraft traveling to the International Space Station Thursday had to make an emergency landing when a rocket engine failed to fire. It was the latest in a recent series of failures for the Russian space program, which is also used by the U.S. to carry its astronauts to the station.

    United States astronaut Nick Hague and Russian astronaut Alexei Ovchinin landed safely about 20 kilometers from Dzhezkazgan in Kazakhstan. The city is about 450 kilometers from the Russia's Baikonur space center, which Russia operates through an agreement with the Republic of Kazakhstan.

    Both the U.S. space agency NASA and Russia's Roscosmos reported that the two were quickly recovered from the landing area by rescue crews. A spokesman for Russian President Vladimir Putin said, "Thank God the crew is alive" after they had landed safely.

    About two minutes after launching, the three-stage Soyuz booster rocket suffered an unspecified failure of its second stage. Russia's TASS news agency said the capsule carrying the two men separated from the troubled rocket safely. This caused the capsule to drop very sharply into the Earth's atmosphere. Parachutes（降落伞）helped slow the returning capsule. Search and rescue teams were sent to recover the crew.

    Russia's RIA news agency reported that Russia has immediately put off all manned space launches after the failure. Roscosmos head Dmitry Rogozin said he had ordered a state commission to carry out an investigation into what went wrong. He said Russia will share all relevant information with the U.S.

    The TASS news agency said that the ISS crew has enough supplies and that the failed launch will not affect operations.

    The U.S. and other nations have depended on Russia to carry astronauts to the ISS since the retirement of the Space Shuttle program in 2011. In coming years, American aerospace companies SpaceX, with its Dragon 2, and Boeing, with its Starliner, are expected to return to space.