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.

Quick tips for better time management

    Are you a good time manager? If your answer is “no”, here are some tips on how to be a better time manager:

1). Create a daily plan. Plan your day before it starts. The plan gives you a good description of how the day will go on. That way, you will be ready to deal with most of the things you meet. {#blank#}1{#/blank#}

2). Focus. Are you multi-tasking so much that you're just not getting anything done? {#blank#}2{#/blank#} Only focus on what you're doing. You'll be more efficient that way.

3). Stay away from your time wasters. What takes your time away from your work? QQ? Email checking? {#blank#}3{#/blank#} One thing you can do is make it hard to check them — remove them from your browser quick links.

4). {#blank#}4{#/blank#} Don't take on more than you can deal with. For the distractions that come in when you're doing other things, give a firm no. Or do it later.

5). Decide to be early. When you prepare to be on time, you'll either be on time or late. {#blank#}5{#/blank#}However, if you decide to be early, you'll most likely to be on time. For appointments, try to be early. For your deadlines, meet them earlier than required.

A. Learn to say “No”.

B. Most of the time you'll be late.

C. Great ways to know your time spent.

D. Cut off when you need to.

E. Stop checking them so often.

F. Your job for the day is to follow the plan as best as possible..

G. If so, focus on just one key task at one time

    Traveling without a map in different countries, I find out about different ways of directions every time I ask “How can I get to the post office?”

    Foreign tourists are often puzzled in Japan because most streets there don't have name signs. In Japan, people use landmarks (地标) in their directions instead of street names. For example, the Japanese will say to travelers, “Go straight down to the corner. Turn left at the big hotel and go past a fruit market. The post office is across from the bus stop.”

    People in Los Angeles, the US, have no idea of distance on the map: they measure distance by time, not miles. “How far away is the post office?” you ask. “Oh,” they answer, “it's about five minutes from here.” You don't understand completely, “Yes, but how many miles away is it, please?” To this question you won't get an answer, because most probably they don't know it themselves.

    People in Greece sometimes do not even try to give directions because tourists seldom understand the Greek language. Instead, a Greek will often say, “Follow me.” Then he'll lead you through the streets of the city to the post office.

    Sometimes a person doesn't know the answer to your question. What happens in the situation? A New Yorker might say, “Sorry, I have no idea.” But in Yucatan, Mexico, no one answers “I don't know.” People there believe that “I don't” is impolite. They usually give an answer, but often a wrong one. So a tourist can get lost very easily in Yucatan! However, one thing will help you everywhere in the world. It's body language.

    Freelance writers Wanted

    Associated Content is an online publishing platform that enables anyone to earn money by writing articles on the Web.

Writing for AC is a great work opportunity for students, stay-at-home parents and freelance writers –you can work on your own time and submit papers, reviews, essays, etc. on any topic that you have interest in. This is a job you can do from anywhere—all you need is access to the Internet.

    Here's how you get started:

    1) Go to www. associatedcontect.com/join/hotjobs.

    2) Follow the instructions to register.

    3) Fill in your profile(简介),making note of your previous experience and your areas of experience (if any).

    4) Start submitting articles. You'll begin earning money as soon as your articles are published and the amount is based on the page views it receives.

    In addition to our own library of content, we have hundreds of partners (Partner Content Team) who work with AC to obtain high-quality. As such, there are lots of opportunities for our most talented and productive writers to accept “Partner Assignments” on an as-needed basis.

    If you're interested in accepting higher paying Partner Assignments, send us a link to your AC profile once you have submitted at least five articles. We will review all submissions and pass them along to our Partner Content Team. If selected, you will start receiving special paid assignments from us on a regular basis, which you are free to accept or ignore.

    NOTE: we pay our writers via PayPal daily.

    Any questions? Email me: dernel@asociatedcontent.com

    In the years ahead, AI will raise three big questions for bosses and governments. One is the effect on jobs. Although bosses publicly praise the broad benefits AI will bring very much, their main interest lies in cutting costs. One European bank asked a technology company to find a way of reducing the staff in its operations department from 50,000 to 500. This special report has shown that AI-enhanced tools can help reduce staff in departments such as customer service and human resources by a large amount. The McKinsey Global Institute finds that by 2030 up to 375m people, or 14% of the global workers in companies or countries, could have their jobs automated away. Bosses will need to decide whether they are prepared to offer and pay for retraining, and whether they will give time off for it. Many companies say they are all for workers developing new skills, but not at the employer's expense.

    A second important question is how to protect privacy as AI spreads. The Internet has already made it possible to track people's digital（数字的）behaviour in extremely small detail. AT will offer even better tools for businesses to monitor consumers(客户) and workers, both online and in the physical world. Consumers are sometimes happy to go along with this if it results in personalised（个性化的）service. But AI probably brings privacy violations (侵犯) that are seen as shocking and morally unacceptable. In the wrong hands, useful technology could be against fair and equal treatment. Countries with a record of the careful watching of a person place, especially by the police or army and human-rights abuses already using AI to monitor political activity. The police around the world will use AI to spot criminals, but may also look on ordinary citizens secretly, in order to discover things or find out information about them. New rules will be needed to ensure agreement on what degree of monitoring is acceptable.

    The third question is about the effect of AI on competition in business. Today many firms are competing to provide AI-enhanced tools to companies. But a technology company that achieves artificial intelligence could race ahead of competitors, put others out of business and lessen competition. This is unlikely to happen in the near future, but if it did it would be of great concern.

    For thousands of years, people have known that the best way to understand a concept is to explain it to someone else. "While we teach, we learn," said Roman philosopher Seneca. Now scientists are bringing this ancient wisdom up to date. They're documenting why teaching is such a fruitful w ay to learn, and designing creative ways for young people to take part in instruction.

    Researchers have found that students who sign up to tutor others work harder to understand the material, recall it more accurately and apply it more effectively. Student teachers score higher on tests than pupils who're learning only for their own sake. But how can children, still learning themselves, teach others? One answer: They can tutor younger kids. Some studies have found that first-born children are more intelligent than their later-born siblings(兄弟姐妹). This suggests their higher IQs result from the time they spend teaching their siblings. Now educators are experimenting with ways to apply this model to academic subjects. They arrange college undergraduates to teach computer science to high school students, who in turn instruct middle school students on the topic.

    But the most cutting-edge tool under development is the "teachable agent" — a computerized character who learns, tries, makes mistakes and asks questions just like a real-world pupil.

    Computer scientists have created an animated(动画的)figure called Betty's Brain, who has been "taught" about environmental science by hundreds of middle school students. Student teachers are inspired to help Betty master certain materials. While preparing to teach, they organize their know ledge and improve their own understanding. And as they explain the information to it, they identify problems in their own thinking.

    Feedback from the teachable agents further improves the tutors' learning. The agents' questions forces student tutors to think and explain the materials in different ways, and watching the agent solve problems allow s them to see their know ledge put into action.

    Above all, it's the emotions one experiences in teaching that improve learning. Student tutors feel upset when their teachable agents fail, but happy when these virtual pupils succeed as they develop pride and satisfaction from someone else's accomplishment.