A comparison of nesting data recorded in the early 1900s with similar data today for more than 200 species of California birds shows that over all they are breeding(繁殖)5 to 12 days earlier than they did 75 to 100 years ago.
Earlier studies found that many but not all birds in California's mountains are moving north or to higher altitude to find cooler temperatures in the face of global warming.
The shift to earlier breeding that we detected allows birds to nest at similar temperatures as they did a century ago, and helps explain why half the bird species in the mountainous areas of California did not need to shift upward in altitude in response to climate warming over the past century, said Steven Beissinger, a UC Berkeley professor of environmental sciences.
Early spring arrivals have long been noted by the public and reported by scientists, but the assumption has been that the birds are tracking resources, primarily food: with warming temperatures, plants produce leaves and seeds earlier, and insects appear earlier.
The new study spotlights another major reason: by nesting a week earlier, birds produce eggs and young at a temperature about 1 degree Celsius lower than if they nested at the normal time in the same place. This exactly counterbalances the approximately 1 degree Celsius increase in global temperatures over the past century.
"By nesting a week or 10 days earlier, birds are avoiding some of the negative effects of climate warming,"Beissinger said." the good news is that there may be more flexibility for species to respond to climate change than we thought, and not all species may need to move farther north or to higher altitudes, "he added. "But we don't know yet whether staying in place and shifting schedules earlier is a permanent solution, or only provides temporary relief from the 2 degree Celsius rise in temperatures forecast to occur."
Birds may find, for example, that the window of good temperatures for breeding becomes shorter, which may limit the opportunity to re-nest if they fail the first time. Larger species that have a longer nesting period might not have an enough time to complete their nests before it starts to become too warm, he said.
I don't think there is anything more important than health. “Health is the greatest wealth，” wise people say. You can't be good at your studies or work well when you are ill.
If you have a headache, toothache, backache, earache or bad pain in the stomach, if you complain of a bad cough, if you run a high temperature and have a bad cold, or if you suffer from high or low blood pressure, I think you should go to the doctor. The doctor will examine your throat, feel your pulse, test your blood pressure, take your temperature, sound your heart and lungs, test your eyes, check your teeth or have your chest X-rayed. After that, he will advise some treatment, or some medicine. The only thing you have to do is to follow his advice.
Speaking about doctor's advice, I can't help telling you a funny story. An old gentleman came to see the doctor. The man was very ill. He told the doctor about his weakness, memory loss and serious problems with his heart and lungs. The doctor examined him and said there was no medicine for his disease. He told his patient to go to a quiet place for a month and have a good rest. He also advised him to eat a lot of meat, drink two glasses of red wine every day and take long walks. In other words, the doctor advised him to follow the rule: "Eat with pleasure, drink with pleasure and enjoy life as it is." The doctor also said that if the man wanted to be well again, he shouldn't smoke more than one cigarette a day. A month later the gentleman came into the doctor's office. He looked cheerful and happy. He thanked the doctor and said that he had never felt a healthier man." But you know, doctor," he said, “it's not easy to begin smoking at my age.”
The most widespread fallacy (谬论)of all is that colds ire caused by cold. They are actually caused by viruses passing on from person to person. You catch a cold by coining into contact, directly or indirectly, with someone who already has one. If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever. But they do not. And in the isolated Arctic Regions explorers have reported being free from colds until coming into contact again with infected people from the outside world by way of packages and mail dropped from airplanes.
During the First World War soldiers who spent long periods in the trenches(战壕), cold and wet, showed no increased tendency to catch colds.
In the Second World War prisoners at the Auschwitz concentration camp，naked and starving, were astonished to find that they seldom had colds. At the Common Cold Research Unit in England, volunteers took part in experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths, they put on bathing suits, allowed themselves to be with cold water, and then stood about dripping wet in drafty rooms. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.
If then, cold and wet have nothing to do with catching colds, why are they more frequent in the winter. Despite the most pains-taking research, no one has yet found the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and this makes it easier for cold viruses to be passed on.
They were a happy family: four daughters all in the same school in different grades. The youngest, Janice, who was in my class, seemed to be glued (粘) to her mother's skirts. The three older girls took the bus to school every morning, but Janice was always driven to school by her mother.
One Friday, Janice's mother asked for a talk with me. She said in a soft voice, "My husband is going to Europe on business for two weeks, and he insists that I go with him. I have tried to explain over and over that Janice needs me here. But he thinks that she will be fine without me so I have no choice; I have to go. I have told the babysitter to drive her every morning. Will you please give Janice special attention and help her? I want to be sure everything goes well for her."
I told her that we would make every effort to support Janice. I even volunteered to meet Janice at her car so she would see a familiar face. As a mother myself, I'd like to help. Janice's mother thanked me for our understanding.
On Monday morning, expecting a tearful, anxious child, I planned a special program of fun and games. I waited outside to greet Janice, but just then the bus arrived and not three, but four girls got off. Janice skipped along joyfully, saying "goodbye" to her sisters as she ran with two friends into the classroom. I walked slowly into the classroom and called Janice over to ask how the bus ride went. Impatiently she said, "Oh, I always want to take the bus with the other kids, but Mother needs to be with me. You see there won't be any more babies, so I have to be a baby a little longer. While she is away, I'll just ride the bus every day. I am five, you know."
Have you ever tried skiing? Skis are long, mostly flat pieces of metal, wood, or plastic. Skiers attach them to their shoes and use them to get over snow, often down a mountain slope. Nordic skiing and Alpine skiing are major events of the Winter Olympic.
Nordic skiing started in Norway and other countries of north Europe. Cross-country skiing takes place on open, hilly land. A cross-country skier must be able to ski uphill, downhill, and cross flat areas. As for a ski-jumping competition, the skier gets down a steep ramp (斜坡) that curves upward at the end. The skier leaps off the end and tries to "fly" as far as possible and then lands on his or her feet.
Alpine events include downhill and slalom racing. Downhill racing is the fastest and most dangerous of all skiing events. The skiers go down a long, steep course that may have large bumps (隆起物). Along the course are gates formed by single poles or pairs of poles. The skier must ski between them and stay on the course. The winner is the skier who completes the course in the shortest time. Slalom racing is similar to downhill racing. However, a slalom course is shorter and more winding (蜿蜒的) than a downhill course.
A. It requires the skier to make high-speed turns.
B. Alpine skiing started in the Alps of central Europe.
C. Skiing is a winter sport that involves the use of skis.
D. The skier who leaps the farthest and has the best style is the winner.
E. Nordic skiing events include cross-country racing and ski jumping.
F. The skier races over and around large bumps of snow called moguls.
G. They are allowed to touch gates with their bodies as long as their skis stay on the course.
A mother was criticizing her daughter after watching the girl was not good enough to compete at a championship level during the daily training in the gymnastics camp.
The scene reminded me of my1of the day when one of my own gymnastic performances put me close to tears.
My mother became seriously ill when she was young, and she has 2a wheelchair ever since. But she never let that3her. She has raised five children and has a career as well.
One day I joined a gymnastics program at a nearby park. Before long, I was totally4in it. By 1972, I was on the National Gymnastics Team for the Olympic Games. I couldn't think of anything else but 5 a gold medal.
Before the competition, all in my mind was6not to disgrace (使……丢脸)my country and myself. But, though I tried my best, I didn't win a gold medal. I was so7. When the winners were receiving8, I joined my parents in the stands, and we all cried. "I'm sorry. I did my best," said me.
She said nothing but ten words I never9, "Doing your best is more important than being the best." Suddenly I understood my mother10than ever before. She had never let her handicap(残疾) 11her from always doing her best.
Now I approached the crying girl and put a(n)12around her. "Honey," I said." I know you have done your best, and doing your best is more important than being the best. I'm 13 you."
She 14at me with tears in her eyes. Maybe somewhere, someday, she'll15those words along.
Do you Douyin？
Got a moment – or, perhaps, 15 seconds? In the age of fragmented (碎片化的) time, Douyin, which is a massive hit in China right now, can perfectly fill in the gaps when people have nothing (good) to do between two events; its daily plays (spread) over one billion in the past few years. The Meipai(美拍)-like app allows users to produce creative short videos that combine music with mouth shapes or body moves. They can dance, sing, cook or do their hearts desire.
Launched in September 2016, Douyin (own) by Zhang Yiming, one of China's top tech leaders; he chairs ByteDance. Similar to how Meipai worked a time-limited video platform (平台), Douyin is a (collect) of brief 15-second music videos, mainly focused on young people, it's certainly suitable for all ages.
On the platform, childish and strange behaviors are (total) acceptable. In high-pressure world, it is no surprise that Douyin has become so successful – all you need to do is pick up your phone and open the app to relieve some stress and have laugh. The app pushes related videos and products based on users' preferences and consequently, Douyin can be quite addictive – many people just want to enjoy a few minutes at first, but end up (consume) several hours' video time.
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。
On my way home from school last Friday, I saw a little dog on the sidewalk looking hopelessly. I was held it firmly up in my arms, took it home and feed some milk to it. However, my mom was unwilling to keep them, saying there was enough pets for us, two cats and a dog. I begged my mom not to let it go. Finally, we agreed that it would be deciding by my dad, whom didn't return home from work. Just then the girl and her father drove near, searching for their lost pets. When they thanked us taking care of the dog, I felt very happy.
1）支持者85％，理由…….
2）反对者15％ 理由…….
3）你的看法…….
注意：1）参考词汇 military training军训
2）词数100左右;
Dear editor,
I'm writing to tell you something about the discussion on whether it is necessary for senior one students to take the one-week military training.
……
