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    Suppose you're in a rush, felling tired, not paying attention to your screen, and you send an email that could get you in trouble.

    Realisation will probably set in seconds after you've clicked “send”. You freeze in horrors and burn with shame.

    What to do? Here are four common email accidents, and how to recover.

    Clicking “send” too soon

    Don't waste your time trying to find out if the receivers has read it yet. Write another email as swiftly as you can and send it with a brief explaining that this is the correct version and the previous version should be ignored.

    Writing the wrong name

    The sooner you notice, the better. Respond quickly and briefly, apologizing for your mistake. Keep the tone measured: don't handle it too lightly, as people can be offered, especially if your error suggests a misunderstanding of their culture(i.e. incorrect ordering of Chinese names).

    Clicking “reply all” unintentionally

    You accidentally reveal(透露)to entire company what menu choices you would prefer at the staff Christmas dinner, or what holiday you'd like to take. In this instance, the best solution is to send a quick, light-hearted apology to explain your awkwardness. But it can quickly rise to something worse, when everyone starts hitting “reply all” to join in a long and unpleasant conversation. In this instance, step away from your keyboard to allow everyone to calm down.

    Sending an offensive message to its subject

    The most awkward email mistake is usually committed in anger. You write an unkind message about someone, intending to send it to a friend, but accidentally send it to the person you're discussing. In that case, ask to speak in person as soon as possible and say sorry. Explain your frustrations calmly and sensibly—see it as an opportunity to clear up any difficulties you may have with this person.

Dear Kids Club Applicant：

    Thank you for expressing interest in the Kids Club.Staff members are hired twice a year: November and December for the spring semester,and April and May for the fall semester.

    November 20^th is the application deadline for the spring semester of 2017.Applications can be submitted（提交）in person to the Community Education Office,located at 1812 Welsh Avenue,during the hours of 8:00 am-4:00 pm, Monday through Friday.

    If you have any questions you may contact my office at the number below.

    Thanks again,Jana Church Program Director.(979)764-3831

    All applicants must meet the following requirements to be considered for hire:

    Available Monday-Friday,2:45 pm-6:15 pm

    Attend Training December 17,2016

    Attend Training January 4-15,2017 (we receive children January 5,2017)

    Commit to work through May 28,2017

    Rate of Pay: $8.00-$8.75/hr

Minimum Requirements:

1）.All Kids Club staff members must be currently Red Cross certified in First Aid.

2）.All staff members must be available to begin work on January4,2017 and continue through May 28,2017.

3）.Staff members must attend specified training sessions throughout the year.

4）.Staff members must attend weekly site meetings and monthly staff meetings.

Duties:

1）.Staff members assist the supervisor in performing his/her duties as necessary,such as:

a.Plan,coordinate and apply appropriate activities each day.

b.Lead group games,art projects and other similar activities.

c.Play with the children during free time.

d.Influence children in a positive manner.

2）.Participate in all daily activities. (BE POSITIVE)

3）.Assist in the daily,as well as weekly,clean-up of the facilities.

4）.Other duties considered necessary by Site Supervisor or Program Director

    In high school, all Canadian students take part in a very exciting event. It is "Take Your Children to Work Day". Students will have a chance to work with their parents. My day took place in my mom's work, the York Region Police Department.

    When I arrived, a coach was teaching the officers basic combat(格斗)skills. Everyone tried their best to practice. I could see them sweating and panting (喘气).

    The most exciting part of my visit was a stop at the 911 Communication Center. 911 is the same as 110,119 and 120 in China. Every 911 call in the city is answered here. When I entered the center, I stood beside a call dispatcher (分派人员)arid watched him dealing-with the calls.

    Suddenly, the phone rang, he picked it up and a woman cried for help. There was a robbery in her house. The call dispatcher told her, "Please calm down and move to the safe place quietly. Don't fight with them. Just let them take what they want. Please make sure you are not hurt. We are sending officers there."

    He followed the call and found the address. The call dispatcher chose the five closest police cars from the satellite map and clicked(敲键盘) to send the policemen.  I saw the police cars from the satellite map were quickly moving to the woman's house. Five minutes later, they arrived .I asked the call dispatcher why he sent five cars. He said, "There are different levels of emergencies. Robbery is a high priority (优先),so we have to send five cars." The day was interesting. I leaned how the different departments worked together. The officers were very friendly and admirable.

    For as long as we've known about it, humans have searched for a cure for cancer. Across the world, countless amounts of time and money have been spend on researching a way to stop the terrible disease.

    But now, it seems like the answer could have been inside our own bodies the whole time.

    Recently, the Food and Drug Administration (FDA) in the US, a government agency that's responsible for healthcare, approved a new form of gene therapy that could mean the end of a certain type of cancer.

    The therapy allows scientists to 'train” the immune cells of sick patients to fight leukemia – a blood cancer that mostly affects young people.

    The exciting new treatment works by removing healthy immune cells from the patient, known as T-cells, which are then altered to be able to “hunt down” cancer cells.

    The cells are then put back into the patient, before they begin to get rid of the patient's leukemia over time, similar to how the body fights off other illnesses.

    'this is truly an exciting new day for cancer patients,” Louis J. DeGennaro, president of the Leukemia and Lymphoma Society, said in a news release. Up until now, a drawn-out （持续很久时间的）and painful bone marrow transplant was the only option for many leukemia patients.

    In this procedure, healthy blood cells are taken from a donor and placed into the sick patient, who also has to go through chemotherapy to allow their body to adjust to the new cells.

    But with a recovery rate of around 83 percent–according to a news release published by the FDA–it's hoped that the days of painful trips to the hospital, or even death, are over for leukemia sufferers.

    “We're entering a new frontier in medical innovation with the ability to reprogram a patient's own cells to attack a deadly cancer,” FDA commissioner Scott Gottlieb said in the release.

    “New technologies such as gene and cell therapies hold the potential to transform medicine and... our ability to treat and even cure many intractable（难治的） illnesses.”

    When an ice cube melts, it creates a puddle (水坑). When an ice sheet (冰盖)melts, it raises sea levels. It sounds simple, but scientists have debated for decades whether both the Antarctic and Greenland ice sheets actually were shrinking, and how much that melting contributed to rising sea levels.

    Now, a new study has provided the best evidence of how the polar ice sheets are responding to our warming world. In the study, an international team of scientists looked at 20 years of' data in the ice sheets collected by 10 satellite missions. The team's conclusion: The Greenland and Antarctic ice sheets both are losing ice overall. The researchers also found that between 1992 and 2011, melt water from those shrinking ice sheets caused sea levels to rise by about 11 millimeters.

    Over the 19 years studied, the Greenland ice sheet lost 2.7 trillion metric tons of ice. The Antarctic ice sheet also shrank by about 1.3 trillion metric tons. Previously, some scientists disagreed whether the Antarctic sheet, the largest mass of ice in the world, was shrinking or growing or neither.

    While the Earth is warming overall, the effect of climate change varies from region to region. Over the last 15 years, for example, scientists have something disagreed over how climate change has affected the polar ice sheets. Many studies found that the sheets lost a lot of ice and that not enough snow fell on the sheets to compensate for the loss. But other studies found that the loss of ice was balanced by the gain in snowfall.

    Richard Alley, a glacier scientist at Penn State University, said that many of those studies looked at different areas, and over different time periods. In addition, the studies didn't all use the satellite data in the same way. Those differences made, it difficult to compare the results.

    The data in the new study matched time periods and areas. The study also combined measurements from kinds of satellites.

    A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.

    "It's extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components," said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. "The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own," he said.

    They engineered a series of systems to start and drive the robotic fly. "The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it's connected to," said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.

    While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers' fields or on the battlefield. "Basically, it should be able to take off, land and fly around," he said.

    Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. "You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead," he said. "So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis."