Would it surprise you to learn that, like animals, trees communicate with each other and pass on their wealth to the next generation?

    UBC Professor Simard explains how trees are much more complex than most of us ever imagined.

    Although Charles Darwin thought that trees are competing for survival of the fittest, Simard shows just how wrong he was. In fact, the opposite is true: trees survive through their co-operation and support, passing around necessary nutrition “depending on who needs it”.

    Nitrogen (氮) and carbon are shared through miles of underground fungi (真菌) networks, making sure that all trees in the forest ecological system give and receive just the right amount to keep them all healthy. This hidden system works in a very similar way to the networks of neurons (神经元) in our brains, and when one tree is destroyed, it affects all.

    Simard talks about “mother trees”, usually the largest and oldest plants on which all other trees depend. She explains how dying trees pass on the wealth to the next generation, transporting important minerals to young trees so they may continue to grow. When humans cut down “mother trees” with no awareness of these highly complex “tree societies” or the networks on which they feed, we are reducing the chances of survival for the entire forest.

     “We didn't take any notice of it,” Simard says sadly. “Dying trees move nutrition into the young trees before dying, but we never give them chance.” If we could put across the message to the forestry industry, we could make a huge difference towards our environmental protection efforts for the future.

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1).每处错误及其修改均仅限一词。

2).只允许修改10处，多者（从第11处起）不计分。

Dear David,

    I'm happy that you're interesting in our flea market and here is a brief of introduction of it.

    To raise students' aware of making the most of used things, the Students' Union held a flea market on campus recent. The event attracted a crowd from the whole school, who come here to sell, purchase or swap used goods with their schoolmate. On the market, you could find vary things, from second-hand textbooks, magazines to CDs, bikes or clothes at a lower price.

    In my opinion, the flea market not only provides a platform save resources but also helps students learn some practical skills, where may be useful for their future job hunting.

                                                                                                                                   Yours,

                                                                                                                                 Li Hua

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词；

2．只允许修改10处，多者（从第11处起）不计分。

    During the last summer holiday, I went on a journey to Beijing, that I visited the Great Wall and the Palace Museum. Much to their surprise, there were so much visitors in all the scenic spots that I had to push my way through the crowd. To be honesty, I had a hard time all the way and didn't find the visit enjoyable or worthwhile at all.

    As far as I am concerning, many people have the same experience, so I think that the number of tourist in some popular places of interest should be limited. In an addition, it's better for us travel at different time periods. Only on this way can we enjoyed the beautiful scenery there.

增加：在缺词处加一个漏词符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下面划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词；

2．只允许修改10处，多者（从第11处起）不计分。

    When I was very young, I stayed at my hometown with my grandma. She was a diligent woman. She likes to grow vegetables or takes care of all the houseworks. Though my parents often ask her to quit the work, my grandma never listen. She takes that she does as her great joy. I understand her because I see her smile and satisfied with life. Several months before, my father bought for her a new smartphone. And during the Spring Festival, I instructed her on how email and use the Internet. Aside from emailing, she thinks it feels greatly to talk to their grandchildren on WeChat.

增加：在缺词处加一个漏字符号（^），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：①每处错误及其修改均仅限一词；

②只允许修改10处，多者（从第11处起）不计分。

    I once paid a brief visit China ten years ago and it was my dream to return someday. Travel the length of the country felt like a dream then. However, in 2017 it finally came truly. Not for a few weeks' adventure, and to live and work for a year. It was an unique opportunity to experience many about the mysterious country. I would communicate with people from different backgrounds and have lots of funs. I was warmly welcomed the moment when I arrived at the college. I thought, "I am going to enjoy this." It really go like this. Indeed, my students often ask, "Bruce, why are we always smiling?" What else could I say?

    Robots that can chat, find misplaced glasses, draw airplanes and play with your children are attracting thousands of visitors during an expo in Tokyo as Japan adapts to changes in society.

    Robots, such as the sound-sensitive Chapit, answer simple questions and even joke with people to help the solitary fight loneliness and stay alert (机警的) in old age. "Many old people in Japan live alone and have no one to talk to," said Kazuya Kitamura, a representative of the expo organizer. "Communication robots stay together with old people and don't mind listening to the same stories over and over again."

    While Chapit, a relatively simple robot, managed to attract a partner, many researchers, such as Kiyoshi Matsumoto, a professor at the University of Tokyo, struggle to attract sponsors for more expensive projects.

    Matsumoto's "Personal Mobility Robot", equipped with four cameras and a sensor to recognize the user's centre of gravity, is designed to help the elderly move around without pressing buttons as in traditional wheelchairs.

    The robot can also help find misplaced glasses by recognizing them with a sensor. "We have developed a robot that can assist many people, but because of the high cost, we still haven't found a sponsor," said Matsumoto, who added that the cost of the machine, if produced in large quantities, would be comparable to that of a small car. "In the current economic environment there are few companies willing to invest (投资) in such a costly project," he said.

    Other robots, such as the award-winning "DiGRO", can support busy parents who have little time to play with their children. The robot can use the Internet to find a simple image and then draw pictures, looking after children while parents work.

    Japan is one of the world's fastest-aging countries and the government predicts that by 2050 the population of people over 65 will reach 40 percent.