China is the biggest market in the world, and many countries such as Germany, the USA, the UK and Russia do a lot of business in China. Let's have a look at some important tips to help you be successful when dealing with these nationalities.

    First, you must be punctual (准时的) with Germans. Even 5 minutes late makes a bad impression. Being punctual is also very important in the USA. In the UK, it's important to be punctual for business meetings, but nobody expects you to be on time for a social event. Half past seven really means a quarter to eight, or even eight o'clock! With Russians, you should always be on time, though it is not unusual for them to be one or even two hours late!

    It is best to dress formally and wear dark colours when you meet people from all the four countries. In Russia, designer clothes are very common. Don't be surpri if you go to an office in the UK on a Friday and find everyone wearing jeans. Many companies have “dress down Friday”, when people wear casual (随便的) clothes.

    In Germany, first names are only used by family members and close friends, so be prepared to use titles and last names. In the USA you will usually be invited to use first names almost immediately. The British are quite informal and using first names in business is more and more common, especially among younger people. In Russia, however, nobody uses first names, so use titles and last names.

    In conversation, the British and the Americans value humour, and both like to talk about sport. The weather is also a good topic of conversation with the British and the Americans, but avoid talking about politics. In Russia, say positive（肯定的） things about their country, but avoid making complaints. The Germans, however, prefer to get straight down to business!

    So, use these tips, and you will be on your way to a successful international business career!

    Everyone, from homeless people to billionaires, is likely to be influenced by stress; there's simply no way to avoid it {#blank#}1{#/blank#} Here are five powerful tips for ways to kill stress in almost any situation.

Eat Healthier

    Though a lot of stress is psychological, there are also plenty of physical factors that lead to this natural human response to noticed danger, In order to relieve stress, make sure you're treating your body right. A big part of this is eating healthier {#blank#}2{#/blank#} Anyway, adopting an alkaline(碱性的）diet instead of an acidic (酸性的）one is recommended.

Wake Up Earlier

    {#blank#}3{#/blank#} However, waking up 15 or 20 minutes earlier each morning may have more benefits than sleeping in. By giving yourself some extra time, you won't feel quite rushed in the morning, which leads to better preparation and more confidence.

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    Since you are never going to remove 100 percent of the stress in your life, one of the best things you can do is let it be one of your motivations. This is what stress is designed to do, after all. The psychological and physical reactions brought on by stress are supposed to heighten our senses and empower us to fight off a threat.

Watch a Funny Video

    Here is a simple and practical tip: watch a funny video on You Tube, Research shows that seeing something amusing activates the part of the brain that produces calm physiological(生理的）responses. This can lead to less anxiety and more happiness.

Take Walk Outside

    Whenever possible, make sure you take your walk outdoors {#blank#}5{#/blank#} It can improve energy levels and memory by as much as 20 percent.

A.A number of studies are two important keys to good health.

B.Diet and relaxation are two important keys to good health.

C.There are no magic”anti-stress”foods.

D.However, there are ways to reduce the amount of stress you suffer from.

E.Keep Positive Relationships

F.Let Stress Motivate You

G.It is certainly true that the more sleep you get, the less stressed you'll be.

    Even if trees cannot walk, they are still on the move.

    In parts of the Arctic, entire forests are moving northward. Across the Arctic, temperatures are rising faster than anywhere else in the world. As that happens, the tree line that marks where forests stop and the treeless tundra(冻土地带) starts has been shifting northward. Trees growing along the tree line must protect themselves from the cold wind. To do this, plants tend to grow horizontal(水平的) branches low to the ground. The energy it takes for trees to grow this way means they don't have enough energy to make seeds.

    But as Earth's climate has been warming, trees no longer have to just grow horizontally. Many can instead grow up toward the sky. This takes less energy. And with all the leftover energy. these trees have started producing more seeds. This happens especially in places where the white spruce(白云杉) grows.

    White spruce, which is a North American tree, is quite able to produce a lot of seeds, which can move long distances in the wind. When wind-blown seeds end up on the tundra beyond the tree line, they eventually can sprout(发芽) new trees. This explains how a forest can move. Of course, the process would work only if the tundra were warm enough. But in recent years, the whole planet has been warming.

    New trees will provide shelters for some snow, keeping the sun's rays from making the white surface disappear. Instead, the trees absorb the sun's heat. This warms the surrounding air. The extra warmth encourages even more trees to produce seeds. That further boosts a forest's ability to expand. In addition, more trees will trap more snow, preventing much of it from being blown away. Snow can trap heat in the soil below, which encourages trees to grow. The recent rise of temperature has helped more trees grow. The recent rise of temperatures has helped more trees grow past the tree line. People worry about impacts on the animals that depend on frozen conditions for food and shelter.

The Rapid Rise and Fall of Robot Babysitters

    During the winter of 2017, an 18-year old college student named Canon Reeves spent much of his time trailing a knee-high robot around Fayetteville, Arkansas, as it delivered Amazon packages to students. The robot, created by a start-up called Starship Technologies in 2014, is basically a cooler on wheels; it uses radars, sensors, and nine cameras to make deliveries. Reeves's job was to monitor how it handled various grounds, field comments from the public, and press the off switch if necessary. He said, "People would also ask if it could deliver beer." It couldn't.

    Broadly speaking, jobs of caring for robots fall under the umbrella of careers in automation, which include maintenance, engineering and programming. The demand for people with this skill set is considerable, with 20 million to 50 million new jobs to be expected in this category by 2030, according to the Mckinsey Global Institute. In the year that ended in June 2018, Indeed.com had almost three times the number of positions on the recruitment committee that ended in June 2016.

    Over the last year, a 34-year-old businessman named David Rodriguez spent hundreds of hours following a machine called the KiwiBot around UC Berkeley's campus while it delivered Red bull and other drinks to students. To retrieve (检索) orders, the app encourages students to give the robot a wave; the robot's digital eyes will roll depending on its mood. Rodriguez, who heads business development for the start-up, was tasked, early on, with monitoring the KiwiBot for problems – even carrying it, should the motors fail. Since April 2018, though, the KiwiBot has largely been left unattended, and the majority of human interactions involve technical checks and loading food into the robot. To eliminate the boring work, the team is developing a restaurant robot to collect and load orders – which could happen in 2020. However, Rodriguez assured me that his staff won't be out of work. Everyone holds double roles in the company. Greater robot self-governing just means employees will shift their focus to accounting, engineering, and design.

    Mckinsey estimates that millions of jobs globally could be lost to automation by 2030. "A huge number of jobs will be produced as autonomous vehicles are released into the environment," Ramsey said. In 2016, Bosch started training students from Schoolcraft College, a community college in Michigan, in autonomous-vehicle repair; Toyota has trained students in maintenance as well. "We might even see a return to low-level jobs where people come and fuel the car for you," Ramsey said. "Until we can wirelessly charge, someone needs to refuel them." The hardest-to-automate industries, as it happens, are the ones that require looking after humans, such as childcare, education and health care. Robot babysitters might feel like they have scored the job of the future, but in fact, they might be better positioned.

    When men and women take personality tests, some of the old Mars-Venus stereotypes(定式)keep reappearing. On average, women are more cooperative, kind, cautious and emotionally enthusiastic. Men tend to be more competitive, confident, rude and emotionally flat. Clear differences appear in early childhood and never disappear.

    What's not clear is the origin of these differences. Evolutionary psychologists think that these are natural features from ancient hunters and gatherers. Another school of psychologists argues that both sexes' personalities have been shaped by traditional social roles, and that personality differences will shrink as women spend less time taking care of children and more time in jobs outside the home.

    To test these hypotheses(假设), a series of research teams have repeatedly analyzed personality tests taken by men and women in more than 60 countries around the world. For evolutionary psychologists, the bad news is that the size of the gender gap in personality varies among cultures. For social-role psychologists, the bad news is that the change is going in the wrong direction. It looks as if personality differences between men and women are smaller in traditional cultures like India's or Zimbabwe's than in the Netherlands or the United States. A husband and a stay-at-home wife in a patriarchal(男权的)Botswanan clan(部族)seem to be more alike than a working couple in Denmark or France. The more Venus and Mars have equal rights and similar jobs, the more their personalities seem to separate.

    These findings are so unbelievable that some researchers have argued they must be due to cross-cultural problems with the personality tests. But according to new data from 40.000 men and women on six continents, David P. Schmitt and his colleagues conclude that the trends are real. Dr. Schmitt, a psychologist at Bradley University in Illinois and the director of the International Sexuality Description Project, suggests that as wealthy modern societies level(使平等)the barriers between women and men, some ancient internal differences are being developed.

    The biggest changes recorded by the researchers involve the personalities of men, not women.

    Men in traditional agricultural societies and poorer countries seem more cautious and anxious, less confident and less competitive than men in the most progressive and rich countries of Europe and North America.

    To explain these differences, Dr. Schmitt and his partners from Austria and Estonia point to the hardships of life in poorer countries. They note that in some other species, environmental stress tends to extremely affect the larger sex. And, they say, there are examples of stress decreasing biological sex differences in humans.

By the end of the century, if not sooner, the world's oceans will be bluer and greener thanks to a warming climate, according to a new study. 

At the heart of the phenomenon lie tiny marine microorganisms(海洋微生物) called phytoplankton. Because of the way light reflects off the organisms, these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas, while reducing it in other spots, leading to changes in the ocean's appearance. 

Phytoplankton live at the ocean surface, where they pull carbon dioxide into the ocean while giving off oxygen. When these organisms die, they bury carbon in the deep ocean, an important process that helps to regulate the global climate. But phytoplankton are vulnerable to the ocean's warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunlight and carbon dioxide to grow, but also nutrients. 

Stephanie Dutkiewicz, a scientist in MIT's Centre for Global Change Science, built a climate model that projects changes to the oceans throughout the century. In a world that warms up by 3℃, it found that multiple changes to the colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters, such as those of the Arctic, a warming will make conditions riper for phytoplankton, and these areas will turn greener. "Not only are the quantities of phytoplankton in the ocean changing, " she said, "but the type of phytoplankton is changing. "