There are many idioms in English. An idiom is a phrase that we can't understand from the meaning of each word. The following are some of them.

As the crow flies

    When a bird flies from place to place, it takes the most direct route. But when people drive, they have to follow roads and often go farther. When people give a distance "as the crow flies", they mean the shortest distance between the two points, not the distance you would have to travel by following roads.

    As Dan and his mum drove along the river, they could see the beach on the opposite side. Dan asked "How far is it to the beach?"

    "It's only about a quarter of a mile as the crow flies" his mother said.

Blow hot and cold

    In one of Aesop's Fables, a man blows on his fingers to warm them up and then blows on his soup to cool it down. In both cases, the man is opening his mouth, but what comes out is different. If a person says one thing and later says the opposite, we say that the person is blowing hot and cold.

    "Is Felicia going to try out for the soccer team this year?" Stacy asked.

    "I don't know," Tricia replied." Last week she was saying yes, but this week she's saying no. She's really blowing hot and cold."

Break the ice

    Nowadays people use the phrase to refer to ending an awkward silence by beginning a conversation.

    It was the first day of summer camp. The four girls began to make their beds in silence. None of the girls knew each other, and no one knew what to say. Finally, one of them broke the ice by saying" Hey, where's everybody from?"

Bury the hatchet

    In native American culture, when two nations agreed to end their war, they buried the hatchet. So to bury the hatchet is to make peace with someone else.

Colin could not excuse his sister for breaking his tennis racket. Finally, his sister said, "Colin, can't we bury the hatchet?"

    Finding true love can be pretty tough for a lot of people, but a lady from a fairly well-known San Francisco advertising agency seems to think money helps. She is offering $10,000 to any of her friends who can introduce her to her Mr. Right. She wants to find her future husband through this way.

    The unnamed husband seeker who sent out the email had just finished reading the best-selling book named Lean In. It was 11 p. m. on a Sunday night and she realized this was the second self-help book she had read in the month. She was still single. Things were not looking fine, but there was hope for her still. If the book had taught her anything, it was that she needed to take a more positive role in finding love. After all, if she wanted to get a better job, she wouldn't just sit outside an employer's building and wait for someone to offer it to her, so why should finding a husband be any different? But instead of going out and meeting new people she decided to write an email to all her friends, offering to give them $10,000 on her wedding day if any of them managed to introduce her to her future husband.

    “I am writing you today because I've decided to make an aggressive action plan on finding the man that I get to hang out with forever,” the woman writes in her email. “Introducing me to my husband is just not high on your to-do list. But I think I have an idea that might change that…” You guessed it, and this is where she offers to reward her “closest friends” with cold hard cash.

    “I will personally give ten thousand dollars to the friend who introduces me to my husband.

    Here is how the program works:

    Step 1: You set me up on a date with a man.

    Step 2: I marry that man.

    Step 3: I give you $10,000 on my wedding day.

    I know you're thinking that this is nuts. Just plain crazy. 'You can find a husband without giving $10,000.' Well for starters, thank you! I'm happy.”

    We have most friends at the age of 26 after having spent the first quarter of our lives building up our friendship circle, a new research has claimed.

    The research into friendship shows that our social circle peaks at 26 years and 7 months, at which we typically have five close friends.  Women are most popular at 25 years and 10 months, with men hitting the highest friendship point a little later at 27 years and 3 months.

    The research, by Forever Friends, shows that about a third of adults meet their closest friends when at school, with about a fifth saying they meet them at work.

    Social networks such as Facebook and Twitter now also play a major role in building new friendship. The research points out that 25 to 34-year-olds make 22 friends via Facebook, compared to 18 to 24-year-olds who make 12, and 35 to 44-year-olds who make just 4.

    Forever Friends' relationship coach Sam Owen says, “It is no coincidence that over a third of us meet our best friends at school.  It is a key time in our lives when friendship is growing through sharing notes, giving gifts, seeing each other regularly and laughing a lot.  As adults we can often forget how powerful these small things are and how the little things can make a difference. ”

    Later in life we find ourselves losing friends. Over half of us lose friendship through moving, while 36% say that over time they grow apart from close pals. Having children also causes 19% to drift away from childhood friends.  

    With growing pressures being put on friendship these days, it's important to make time for our friendship.

    Astronomers have taken the first ever image of a black hole, which is located in a distant galaxy (星系).The black hole is 500 million trillion km away and was photographed by a network of eight telescopes across the world. It was captured by the Event Horizon Telescope (EHT).

    The announcement was made in Washington, Brussels, Santiago, Shanghai, Taipei and Tokyo. Details have been published today in Astrophysical Journal Letters.

    Prof Heino Falckc, of Radboud University in the Netherlands, who suggested the experiment, told BBC News that the black hole was found in a galaxy called M87. "What we see is larger than the size of our entire Solar System," he said. "It has a mass 6.5 billion times that of the Sun. And it is one of the heaviest black holes that we think exists. It is an absolute monster, the heavyweight champion of black holes in the Universe."

    The image shows an intensely bright "ring of fire", as Prof Falckc describes it, surrounding a perfectly circular dark hole. The bright halo is caused by very heated gas falling into the hole. The light is brighter than all the billions of other stars in the galaxy combined - which is why it can be seen at such distance from Earth. The edge of the dark circle at the center is the point at which the gas enters the black hole, which is an object that has such a large gravitational pull (万有引 力）,not even light can escape.

    "It is remarkable that the image we observe is so similar to that which we get from our theoretical calculations. So far, it looks like Einstein is correct once again." said Dr Ziri Younsi, of University College London -who is part of the EHT cooperation.

    Chinese scientists were involved in the observation through a telescope in Hawaii. They were also highly involved in follow-up data processing and theoretical analysis, said Shen Zhiqiang, head of the Chinese Academy of Sciences' Shanhai Astronomical Observatory and a member of the EHT international team.

    Shanghai and Taipei were selected as two of the cities to hold news conferences, together with Washington, Brussels, Santiago and Tokyo, a recognition of China's contribution.

    "In the fields of astronomy, radio astronomy, and space astrophysics, China has made a significant contribution to this global project," Falcke said.

Grandma celebrated her fifty-third birthday just weeks before grandpa died of cancer in 1965. Although his passing was very difficult for her, I think their shared struggle to make his life longer taught grandma that good health was not to be taken for granted, and she made up her mind to live her rest of her own life as fully and as long as she could. One day, when she announced to attend lessons at the Fred Astaire Dance Studio in Portland, Oregon, where she lived, we rolled our eyes in embarrassment and helplessly wished she would just stay home and bake cookies as normal grandmothers did. Many years filled with countless dance lessons passed before we learned to appreciate the wonder of having a dancing grandma.

I suppose grandma's primary motivation for wanting to learn to dance was social. She had been a shy girl, always very tall and heavy, and had married into grandpa's quiet lifestyle before developing any elegance or confidence in her personal appearance. Dancing, on the other hand, filled her life with flash lights, wonderful parties, beautiful dresses, handsome young dance instructors, and the challenge of learning. Although the weekly dance lessons did not change her ample, two-hundred-pound figure, grandma surprised everyone with energetic performances on the dance floor, which soon gave her as much elegance and confidence as any Miss American competitor.

Having taken weekly dance lessons for years, my grandma learned various dances easily and was soon participating in dancing matches all over the Northwest. When I was fourteen, grandma proudly invited me to watch her compete in one of these matches to be held in the grand ballroom of the Red Lion Inn. My attitude was still unenthusiastic at that point, but to make her happy, my mother and I attended the match. As if to prove me wrong, grandma made a wonderful showing in every event she entered. I thought she was truly the queen of the ball during the dance, and my thoughts were shared by the judges a short time later when she was awarded a gold cup for her outstanding performance.

Last August, the 900-year-old Wan'an Bridge in Pingnan County, a locality of Ningde City in the coastal Fujian province, was destroyed when it suddenly caught fire.

Wan'an, a national-level protected building, was a wooden arch corridor bridge (木拱廊桥),which for centuries was an ancient architectural calling card for the region. The bridge,98.2 meters long and 4.7 meters wide, was first built in the Song dynasty (960~1279), and was the longest wooden arch corridor bridge left standing in China. Few, however, had imagined that such an ancient bridge would attract public attention in such a way.

Amid the powerful voice of the local population for new wooden arch bridges, the traditional techniques behind the building work have well and truly been revived (唤醒), but the protection of the ancient buildings still has much room for improvement.

Currently, China's approach to the protection of national heritage sites puts protecting and rescuing endangered buildings before all else, but to keep these ancient buildings alive, preventive protection is key.

"Technically, restoring (修复) Wan'an isn't very difficult," said Li, Deputy County Mayor of Pingnan. "Along with the help of the local inheritors of the national intangible cultural heritage, the bridge's restoration looks hopeful. However, the historical value will definitely be affected."

Meanwhile, Zhan, the former Deputy Dean at the Chinese Academy of Cultural Heritage, pointed out the recent destruction of Wan'an Bridge highlights a serious shortage of warning mechanisms and preventative protection measures, which currently are supposed to be the most important part of protection. "Significant improvements have been made in the past few years in protection, but we still have a long way to go on proper planning for protection work. How to protect cultural heritage is a matter that we need to discuss as soon as possible," he added.