Scientists are debating how to limit their newly-discovered power to change genetic structure (结构). Scientists already modify the genes (基因) of farm animals and agricultural plants to make them more productive or stronger. But now they can also change genes in wild animals and plants. These genes would continue into later generations. For example, it may be possible for scientists to remove from existence the kind of mosquitoes, small flying insects, that carry the Zika virus. They might also be able to permanently remove species (物种) of plants and animals that are damaging to other species.

    In a report published last week, the U. S. National Academies of Sciences, Engineering and Medicine (NAS) said it supports continued research on this kind of gene control. But it warned that it is not possible to know what will happen when these changed plants and animals are released (释放) into the wild.

    Sixteen biologists, ethicists (伦理学家) and policymakers are on an NAS committee that is examining the issue. They say that there is value to the new technology. But, they say, there is not enough evidence to support the release of modified organisms (生物体) from the laboratory into nature.

    Many people would support stopping mosquitoes and rats from carrying diseases. But scientists say we must understand the possible scientific, ethical, legal and social results of such action before we decide whether to take it. Gene modification is spread through reproduction (繁殖).

    Changed genes will continue to spread as long as an animal or plant continues to reproduce. They cannot be limited to a farm or kept within a country's borders. Scientists are wondering what may happen if a modified organism mates with another species. They are not yet sure how the modified genes would affect the other species. It is possible that those genes could harm those creatures or even lead to their disappearance from our planet.

How to Love Your Parents

    Even if you think that your parents are mean-spirited at times, loving your parents is a normal and fulfilling part of life. You love them for the fact that they created you, raised you, and are in part, a source of who you are.{#blank#}1{#/blank#}

    Tell them you love them every morning. A gentle "good morning" and "I love you" will warm a coldest heart. Remember that they brought you into this world. Without your parents, we might still wander at an unknown corner in an unknown world.

    Respect them more and cherish these moments. You can use these moments to learn from them, preparing yourself for when you're off on your own. It's OK to get angry but angry actions don't help you or your parents. Act calmly, cool off, write down your feelings, or talk to a friend.{#blank#}2{#/blank#}

    Obey their requests. It will make your attitude better and earn you more respect from them. It may seem like you are going through hell when you don't get what you want or you have to clean. However, you had better remember they keep a roof over your head when it's cold, raining, snowing, or too hot. Understand that parents are human beings and make mistakes.{#blank#}3{#/blank#} Since you can forgive your friends, why not forgive your parents?

    Keep company with them. Do things with your parents like watching TV, or go somewhere with them.{#blank#}4{#/blank#} Listen to their old stories and learn from them. You will find they are your teachers in this way or another.

    Some people simply may not be able to love their parents. {#blank#}5{#/blank#} Seek help if you are being abused（虐待）in anyway．Parents do not have a right to harm you.

A. Parents will in turn express their love to you.

B. Forgiveness is the key.

C. Here are some ways to love your parents.

D. There can be realistic reasons for this, family violence for example.

E. Anyway, spend as much time with them as you can.

F. After that, share your feelings with your parents.

G. Please remember parents are as important as friends.

    A large body of research has been developed in recent years to explain many aspects of willpower. Most of the researchers exploring self-control do so with an obvious goal in mind: How can willpower be strengthened? If willpower is truly a limited resource, as the research suggests, what can be done to make it stay strong?

    Avoiding temptation (诱惑）is an effective method for maintaining self-control, which is called the “out of sight, out of mind” principle. One recent study, for instance, found office workers are less attracted to candy in the desk drawer than that on top of their desks, in plain sight.

    The research suggesting that we possess a limited reservoir of self-control raises a troubling question. When we face too many temptations, are we to fail? Not necessarily. Researchers don't believe that one's willpower is ever completely exhausted. Rather, people appear to hold some willpower in reserve, saved for future demands. The right motivation allows us to tap into those reserves, allowing us to carry on even when our self-control strength has been run down. High motivation might help overcome weakened willpower—at least to a point.

    Willpower may also be made less vulnerable (脆弱) to being exhausted in the first place. Researchers who study self-control often describe it as being like a muscle that gets tired with heavy use. But there is another aspect to the muscle comparison, they say. While muscles become exhausted by exercise in the short term, they are strengthened by regular exercise in the long term. Similarly, regular practices of self-control may improve willpower strength.

    The evidence from willpower-exhaustion studies also suggests that making a list of resolutions on New Year's Eve is the worst possible approach» Being exhausted in one area can reduce willpower in other areas, so it makes more sense to focus on a single goal at a time. In other words, don't try to quit smoking, adopt a healthy diet and start a new exercise plan at the same time. Taking goals one by one is a better approach. Once a good habit is in place, Baumeister says, you'll no longer need to draw on your willpower to maintain the behavior. Eventually healthy habits will become routine, and won't require making decisions at all.

    Many questions about the nature of self-control remain to be answered by further research. Yet it seems likely that with clear goals, good self-monitoring and a little practice, you can train your willpower to stay strong in the face of temptation.

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