Keeping pace with teachers is a fine way to study English. Teachers are experienced and their plans are systematic. But remember to work in a way that suits you. It's important to learn from past mistakes as well. Keep a notebook to make a record of the mistakes you make－it'll help you avoid making the same ones later.

    The time of life may be hard，but you're not alone. You may be busy studying，but you can show your care by calling your friends or sending short messages. Don't let your friendships die.

    It's as important to live well as it is to study well. Going to bed no later than 11：30 pm is vital. It puts you in the right mood for the next day. You needn't follow a special diet，but make sure you are eating nutritious meals each day.

    The person who plays well，studies well. Having a lot of schoolwork doesn't mean having to give up other activities. Playing basketball or having a talk with your classmates can relax yourself. Time out is not a waste of time but helps you study more efficiently.

    Besides taking the big exam，you have other choices for college. I took the independent enrollment exam held by Peking University and some other students even were preparing to study abroad. Pay attention to any relevant information you can find，whether it's from school，the news media or other sources.

Wilderness

    “In wilderness(荒野) is the preservation of the world.” This is a famous saying from a writer regarded as one of the fathers of environmentalism. The frequency with which it is borrowed mirrors a heated debate on environmental protection: whether to place wilderness at the heart of what is to be preserved.  

     As John Sauven of Greenpeace UK points out, there is a strong appeal in images of the wild, the untouched; more than anything else, they speak of the nature that many people value most dearly. The urge to leave the subject of such images untouched is strong, and the danger exploitation(开发) brings to such landscapes(景观) is real. Some of these wildernesses also perform functions that humans need—the rainforests, for example, store carbon in vast quantities. To Mr.Sauven, these ”ecosystem services” far outweigh the gains from exploitation.

    Lee Lane, a visiting fellow at the Hudson Institute, takes the opposing view. He acknowledges that wildernesses do provide useful services, such as water conservation. But that is not, he argues, a reason to avoid all human presence, or indeed commercial and industrial exploitation. There are ever more people on the Earth, and they reasonably and rightfully want to have better lives, rather than merely struggle for survival. While the ways of using resources have improved, there is still a growing need for raw materials, and some wildernesses contain them in abundance. If they can be tapped without reducing the services those wildernesses provide, the argument goes, there is no further reason not to do so. Being untouched is not, in itself, a characteristic worth valuing above all others.

    I look forwards to seeing these views taken further, and to their being challenged by the other participants. One challenge that suggests itself to me is that both cases need to take on the question of spiritual value a little more directly. And there is a practical question as to whether wildernesses can be exploited without harm.

    This is a topic that calls for not only free expression of feelings, but also the guidance of reason. What position wilderness should enjoy in the preservation of the world obviously deserves much more serious thinking.

    When slaves were first brought over from West Africa to the southern parts of America, they brought along with them aspects of their own culture—religion, dance,language, music, and cuisine.A mix of the two cultures eventually appeared.The religious dance of the ring shout turned into modern dances like the Charleston, and tribal chants slowly transformed into sorrowful hymns (圣歌) sung by slaves that described their hardships.

    These soulful accounts by slaves of the severe climate and conditions began to be called “the blues”,which continued in popularity among African Americans after the Civil War.This music increased in popularity into the early 1900s when many black musicians became an important part of the music industry.

    The slaves that had been brought over were from all different regions of West Africa, but they worked together until they gradually formed a common culture.This strengthened the identity of their music that, in the 1950s, eventually led to the beginning of rock and roll.The Beatles, the most influential band of the 1960s, are often determined as the accelerator that resulted in the ideology (意识形态) surrounding music that is still around today.The freedom and individuality associated with that time period brought forth a whole culture surrounding music.It was not just music any more, but a lifestyle.

    Over the decades, music has developed into such a vital part of society and pop culture.Musicians are glorified, with tons of adoring and screaming fans.The modern technology of present day has allowed for a greater gap between the creator of the music and the fans, as well as a widespread commercialization of music.However, criticisms of modern pop music often arise due to its mass production, and now there is a lack of the same soul and quality of naturalness and simplicity in music that was rising in the early 20th century.

    I do not know Sybrina Fulton. Nor can I claim to understand the depth of her pain. Yet, we share a deep connection. A common feature experienced by those women who face the challenge of raising a Black male child in a nation that far too often views Black male bodies through fear. You see, Ms. Fulton is living my nightmare (恶梦). A constant worry that has stayed in the back of my mind since the birth of my eldest son, some sixteen years ago.

    Through the years, I have witnessed the world's reaction to my son evolve as he has grown from a small boy to a young man. In his early years, his easy smile and lovable character were nothing less than magnetic (有磁性的). Complete strangers would approach him in the street, draw him into conversation, and find themselves easily struck by his lively spirit. Even at that time I worried, how would my son react when in the years to come some of those who found themselves so impressed by this cute, intelligent boy, might grasp their purse tighter as he walked by.

    Over the years I have sought to protect his spirit from the hurt that comes from undeserved hatred. I have also sought to arm him with the knowledge that could one day save his life. He knows, for example, that if he is ever pulled over by the police, that he is to keep both hands on the wheel at all times and only reach for his license when the officer is specifically observing his actions. He knows, even in less threatening situations, that rough play and loud interactions with his buddies of any color will be viewed very differently when he does it, than when his white friends display the very same behavior. Still, the truth of the matter is, no amount of advice or voiceless behavior overcomes the physical, immovable fact of the color of his skin. His intelligence, easy smile, and lovable character won't protect him from unfounded assumptions of criminality.

    What makes the Trayvon Martin travesty (歪曲) of justice so painful to me, personally, is the knowledge that Trayvon's mother loved her baby no less than I love mine. The various pictures of moments throughout a happy childhood that have now found a home on nationwide newscasts provides clear evidence of that. Yet no amount of love and care, and no words of advice could have saved her son from the cruel killing he faced at the hands of a self-appointed neighborhood watch-dog. And perhaps even worse, nothing could have prepared her for the inhuman way her son has been treated by officials even in death. To think for three long days, his parents searched for him while officials failed to inform them of his fate and instead, performed drug and alcohol tests on his lifeless body, while failing to do the same for his attacker—the only one of the two who indeed had a criminal past is frankly, unforgivable. To know that the words of her son's killer were given more weight than eye-witnesses and taped evidence of her child's screams and eventual death must be heartbreaking. But to also have to live with the fact that his attacker still breathes free while her son lays buried underground is certainly more than any sorrowful parent should have to endure (忍受).

    It is this type of pain that is not unfamiliar to the Black experience in America, for this is the Black mothers' burden. A burden we have endured for centuries. We know the pain of having our newborn babies grabbed from our loving arms to be sold into lifelong servitude (奴役) and to never again experience the warmth of a mother's loving hug. Yet, there is still the rightful expectation, that in modern-day America, the wheels of justice would not be stopped.

    So today, it is my hope that Trayvon's mother, father, family and friends can take some comfort in the fact that millions of Americans of every color stand with them in their fight for justice. This is a burden no family should have to endure alone.

    We will not give up.

    We will not forget.

    We will continue the fight until justice is done.

    Hacking isn't just for computers and smartphones, According to a study published last week in the journal Science, scientists have found a way to hack a plant's genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world.

    Photosynthesis（光合作用）is the word used to describe how plants use sunlight, water, and carbon dioxide to make their own food. Scientists who conducted the new study say this is a very slow process. Plants use less than 1 percent of the energy available to therm. But by hacking a plant's genes, the scientists were able to increase the amount of leaf growth on plants between 14 and 20 percent.

    "Specifically, scientists hacked the plant's protective system. Normally, this system is activated when a plant gets too much sunlight, "said scientist Krishna Niyogi, co-author of the study. When the plant senses the light, it gets rid of extra energy and creates more leaves. When the plant is in shade, the protective system is turned off, but the process is slow.

    Stephen Long is the lead author of the study. He compared a plant's protective system to light-adjusting glasses. When a person wears the glasses outside during the day, the lenses（镜片）darken and lighten depending on how sunny it is. Plants do the same thing, he said. But in plants the adjustment can take anywhere from 10 minutes to an hour. This makes it hard for plants to get the right amount of sunlight needed to create food.

    The new study sped up the process. By changing the plant's genes, the protective system turned on and off more quickly than normal. As a result, leaf growth on the plants scientists used in the study increased. Leaf growth in two plants increased by 20 percent, while leaf growth on a third plant increased by 14 percent. Scientists conducted the study on tobacco plants. But they think the genetic changes will produce the same results in corn and rice.

Smartphones can be a force for good. Your phone is always with you, making it the perfect device to push you into a more beneficial way of living. Here are some of the best apps that can help.

Habitica

Habitica turns the goal of forming good habits into a game, with its own characters and scoring. It's a lot of fun, and the app also lets you build habits with friends and family. In addition to regular repeating habits, you can add a more general to-do list, and the rewards you get can be customized too—you could treat yourself to a meal out or an extra hour of games.

Smoke free

If you're determined to give up smoking, Smoke Free is one of the most comprehensive apps for giving you that extra push you need to make a permanent change. The app offers a host of useful features to people wanting to go smoke-free: the ability to see your progress over time, charts showing how your health is improving, day-by-day encouragement, and some advice on techniques for giving up smoking.

MyFitnessPal

You can find tons of health and fitness apps for your phone, but My FitnessPal stands out not just because it is easy to use, but because it makes practical suggestions for you. It can take in a host of data, from the calories you're taking in to the number of swims you're doing per week, and offer reports on calorie consumption and macronutrient (大量营养素) breakdown.