【正文】 can use the energy of the birds in front of them. These energy es from the air currents, generated by the wings. Conserving energy is necessary for the birds to survive in long journey. Who did the birds know this? It’s truly amazing how the birds know this. Another amazing example of survive animal is the Salmon. Salmon spent most of their lives in the ocean which is salty water. Yet, when it’s time to breed, they do so in fresh water rivers. Salmon can adapt their bodies to survive in both saltwater and freshwater. When it’s breeding time, they returned to the same water where they were born. It seems as if they had builtin map that guides them for a hundred of miles. Once they left the salt water, they don’t eat. They are determined to finish their journey despite of many obstacles. They swam against the strong currents, jump over the waterfalls and try to escape the claws of hungry bears. Many die along the way but enough of them survive to breed and reproduce the next generation. Once they had lay their eggs, they die, having pleted their journey. It seems that their purpose in life is just to reproduce. Migration takes the animals to new, more favorable environments when seasons change. Some of these journeys are long and dangerous along around not obvious landmarks. The longest migration is that of a tern. It flies from polar to polar, twice a year. If a tern achieves its average lifespan of 20 years, the distance it has flown will be equivalent to a journey to the moon and back. Humans also migrate but seldom if ever for seasonal variations. fortunately, human migrations are often due to human activities. Since the beginning of the 21st century, large scale migrations had bee a global problem. Millions of migrates had had to leave their countries and look for new homes. Many have died along the way or left these refugees in camps until they are admitted into a new country. So the question remains as to how our global munities will face these challenges. L5 Unit 14 vocabulary 重點(diǎn)動(dòng)詞、形容詞4To criticize someone is to point out their false or mistakes. Some people appreciate constructive criticism, which can help them develop their skills. To praise someone is to let them know they have done a great job. Some people expected to be praised when they perform well. To apologize to someone is to admit that you have done something wrong or hurtful. One way to apologize is to say you are sorry. If your apology isn’t accepted, it means the person hasn’t forgiven you. To order people to do something means to use your power or position to get them to do it. Many people dislike being ordered to do things. In many cases, it’s better to make a request than order someone to do something. To encourage someone is to support their efforts and help build their confidence. A good teacher encourages students to do their best. To discourage someone is to get away their confidence. There are many cycle in nature, such as the circles of seasons. A cycle is a series of events that repeat, such as the daily cycle of light and dark. To evolve means to change or improve over a period of time. In biology, the series of evolution advanced life forms such as such as humans, have evolved from lower form of life. A force of attraction brings two objects closer together, such as the force of gravity. A force of repulsion pushes two objects away from each other, such as the force between two electrons. To transform means to change from one form into another. A transformation occurs when an object takes on(呈現(xiàn)) a new appearance or structure. To inherit something means to get it without having to ask or work for it. A child from a very rich family may inherit a lot of money. The number of times a cycle repeats itself within a period of time is its frequency. Gravity is a force of attraction between two objects with mass. L5 Unit 14 dialogue 沖突處理Excuse me, do you have a minute?I’m sorry, not right now. I’ll be free about in 15 minutes. Could you e back then?No, I’m afraid we have an emergency upstairs. Can’t you handle it?No, I think it will be best if you were there. Ok, I’ll finish this call and be right with you. Ok, what’s it?Kevin and Bob are shouting at each other and it’s upsetting everyone. Oh, not again. Both two have got to grow up. Who started it?I’m not sure but they were even pushing each other. Ok, this is unacceptable. You run on ahead and warn them that I’m ing. I want them to calm down before I get there. Can you do that?Ok, I’ll do what I can to calm them down. But you know Keven, he’s such a hard heart. Ok, Keven, I’ve warned you before. This is got to stop. Yes, I know. But Bob doesn’t cooperate. He’s impossible to work with. Even so, you can’t go around pushing people. That’s no way to handle things. If you weren’t doing such a good job, I’d have to let you go right now. Your behavior just isn’t acceptable. Yeah, I understand and I’m sorry. I just can’t stand working with him. I’m sure what to do. What were you do if you were me? Do you have any suggestions?To be honest, if I were you, I wouldn’t have the two of us working in the same office. I know Bob has been with the pany longer than I have but he’s doing a terrible job. When you are not around, he just bully people. People are afraid of him. Ok, I’ll look into(調(diào)查) a bit more. But you’ve got to promise me to keep cool and not let this happen again. Ok, I’ll try to handle things differently next time.