To us, it seems so natural to put up an umbrella to keep the water off when it rains. But in fact the umbrella was not invented as protection against the rain. Its first use was as a shade against the sun.

    Nobody knows who first invented it, but the umbrella was used in very ancient times. Probably the first to use it were the Chinese, way back in the eleventh century B.C..

    We know that the umbrella was also used in ancient Egypt and Babylon as a sunshade. And there was a strange thing connected with its use: it became a symbol of honor and power. In the Far East in ancient times, the umbrella was allowed to be used only by those in high office or by royal people such as the kings or queens.

    In Europe, the Greeks were the first to use the umbrella as a sunshade. And the umbrella was in common use in ancient Greece. But it is believed that the first persons in Europe to use the umbrellas as protection against the rain were the ancient Romans. During the middle ages in Europe, the use of the umbrella most disappeared. Then it appeared again in Italy in the late sixteenth century. And again it became a symbol of power.

    Umbrellas have not changed much in style during all this time, though they have become much lighter in weight. It wasn't until the twentieth century that the umbrellas for women began to be made in all kinds of colors.

    China has become the first country to successfully land a spacecraft on the far side of the moon. The Chang'e-4 probe (探测器) has also made the first lunar landing since 1972. It has the task of exploring the side of the moon that never faces the earth. The dark side of the moon is older and has a thicker surface than the visible side. It takes the moon as long to go around on its own axis (轴) as it does for one complete orbit around the Earth.

    The Chinese probe landed in a huge crater 2500 km in diameter and 13 km deep. The crater is one of the oldest parts of the moon and our solar system.

    Scientists hope to learn more about the geology of the far side of the moon. The craft has two cameras on board which will send images back to earth. It will also attempt to send signals to distant regions of space, something that cannot happen on earth because of too much radio noise.

    Chang'e-4 also has instruments on board to examine minerals as well as a container with seeds which will try to create a miniature (微型的) biosphere (生物圈).

Communication with the spacecraft is not easy. Images and other data must be transmitted to a separate satellite because no direct communication with the earth is possible.

    For China the Chang'e-4 mission is an important achievement, because the country has successfully done something no other nation on earth has. It wants to become a leading power in space exploration and has announced plans to send astronauts to the moon and set up its own space station.

    I believe children have a very pure sense of humor. Well, I would like to share my experiences with you.

    The other day when I was out with a friend and her daughter Jane at a restaurant, Jane ordered an apple dessert, which was the most attractive dish in that restaurant. However, when she had a bite of the pie, she shouted loudly, "Mom, why does it look good but tastes like rubber?" My friend was uneasy. Then the waiter gave us another dish.

    A child can say funny things. I was at a friend's home for tea and her son, Mark, wanted her to get up. His mom replied, "I can't, because my foot has fallen asleep now." Little Mark then sang a song and asked, "Mom, will it wake up now?" We laughed together.

    The other day we were having an interesting conversation over lunch and my friend, an animal activist (积极分子) , was arguing with another group member. Her son Tommy suddenly stood up, “Mom, people should never be allowed to shoot extinct animals!” That was funny and the child did manage to turn the argument into a pleasant conversation.

    Well, children sometimes really surprise us. I think we can have a lot to learn from them. They can help us understand the simple world through their eyes.

    Here are some great people and their achievements.

    Mary Anderson ­ windscreen wiper.

    Back on a freezing winter's day in 1902, Mary Anderson was travelling by train through New York City. Snow was falling, forcing the driver to stop repeatedly and get out to clear it. Each time the door opened, Mary suffered a gust of sub-zero air. She had an idea: why not make some kind of a rubber blade that could be operated from inside the vehicle? And that's exactly what she did.

    Josephine Cochrane ­ dishwasher

    The dishwasher dates back even earlier to the 19th century, and to the dinner parties thrown by a lady called Josephine Cochrane. As a frequent host, she wanted a machine that could wash dishes faster than people. Her response was to develop what was to become the first commercially successful dishwasher. Interestingly, innovation was in her blood: her grandfather had invented the steamboat.

    Stephanie Kwolek ­ Kevlar

    Kevlar is the lightweight fibre used in bulletproof vests. The material is used by millions every day and has saved countless lives. The super tough fabric is also used in objects ranging from gloves to airplanes. Incredibly, its strength-to-weight ratio(比强度) is five times higher than steel. Again, it was invented by a woman, the American chemist Stephanie Kwolek, in 1964.

    Grace Hopper ­ first compiler(编译程序)

    One of the most important inventions of the 20th century must surely be the computer programme. The world of programming is unbalanced in terms of gender. Men vastly outnumber women, and take home around 30% more pay than their female counterparts on average. But back in the 1940s and 1950s, women were at the forefront of this new field. Grace Hopper is credited with inventing the first compiler in 1952, which serves as the bridge between code and the binary(二进制的) ones and zeros understood by computers.

As a child I once read a story of two men who walked 2,650 miles from Mexico to Canada with huge packs,  {#blank#}1{#/blank#}caught my eye, as L, too, dreamed of adventures in the wilderness. I've always remembered that story,{#blank#}2{#/blank#}never believed I would actually make it. It was too far out of my comfort zone.

But then, at the age of 42, I{#blank#}3{#/blank#}(hike) the 88 Temples Trail through Japan There, I experienced how attractive it could be to hike alone.{#blank#}4{#/blank#}impressed me most were the fantastic mountains, grand temples and generous local people.

When I shared my plan {#blank#}5{#/blank#}friends and colleagues, the news was welcomed with mixed{#blank#}6{#/blank#}(react). From some I got enthusiastic approval. But from others there were frowns and question marks. Half a year away from my family was{#blank#}7{#/blank#}challenge for me. Yet it wouldn't defeat me. After all, six months is{#blank#}8{#/blank#}(simple) a short period in a lifetime.{#blank#}9{#/blank#}(work) hard for 20 years in shiny office buildings, I felt the need for more adventure in my life. I hoped to slow down and look within, as well as explore the unfamiliar things. I understood that I needed them both.{#blank#}10{#/blank#}John Muir once said, "Keep close to nature… and climb a mountain or spend a week in the woods. Wash your spirit clean."

The snow arrived earlier than predicted as I1 grocery bags into the Chevy's trunk and shut the hatch. Several feet of snow already covered our community, and this new2 was, of course, another cruel3 . "It'll probably be the disaster of this century, "I complained, thinking about the past few difficult years. Id4 the illness and the financial loss, but something else was5 me —the hopelessness that results from6 goals, 

Usually a positive person of7 , I had always viewed life as a series of problems to8 . 

Though I thought I'd handled the dilemmas well, I hadn't9 that the real me, the one whose passion for life had10 others, had burned out. In the past year, I had been faced with11 choices, and I'd made critical12 . Now I was afraid to trust my judgment and my future. 

When nighttime arrived, I decided to take a walk. Outside, my feet seemed to be13 in the endless white as I walked along snowy fields toward the forest. Somewhere along my journey, I realized I'd been crying. Pausing to catch my breath, I felt a moment's14 I'd traveled off the recognizable path from my home. Tired and defeated, I fell and15 against a very strong trunk,16 my head on my drawn-up knees17 . A deer stood only a few inches away, locking her stare on mine. A few minutes passed, she stepped closer and lowered her head to18 my pocket as if to be in search of food. I felt my pocket and offered an apple to her gently. 

"Mistakes can bring positive outcomes, after all. " Excited by my new19 , I moved ahead, growing tired but pressing onward. It's the20 and willingness to learn from the past and then press onward that can lead to a joyful future.