On a hot summer day, there are few things that are more wonderful than a nice cool pool.

    {#blank#}1{#/blank#}And it is completely relaxing. Of course, if you have children, there are certain measures you should take to keep them safe, whether you have a pool in your backyard or you are going to a public pool.

    People should never swim by themselves. Actually it only takes a second for people to become injured and drown(溺水). {#blank#}2{#/blank#}This is especially true for young children.

    Splashing(玩水) is fun, but don't take it too far. {#blank#}3{#/blank#}Kids love to go after one another through the water and to splash and jump around. But it is important to teach children not to jump on top of one another and to watch their surroundings in the water, so that they do not accidentally knock into others.

    If you have a pool, you must have a locking gate around your pool. {#blank#}4{#/blank#}Keep the gate knocked at all times, even when you are in the pool.

    Know the way out. {#blank#}5{#/blank#} Make sure that they know where all ladders are and how to enter and get out of the pool properly. Although your children may be able to lift themselves out of the pool using the side, that is not the safest way to go.

A.Kids should be taken good care of when they are swimming in the pool.

B.This is to prevent children from entering your pool without your knowledge.

C.And having someone there with you can make the difference between life and death.

D. Be sure to show all children the proper way to get out of the pool.

E.Even so, attempt to avoid getting any pool water into your mouth.

F. Jumping into the water seems like the perfect way to deal with the heat.

G. .Playing around in the pool can be a lot of fun.

    As is often the case, when your teacher asks a question, there is only one correct answer. But there is one question that has millions of current answers. That question is "What's your name?" Everyone gives a different answer, but everyone is correct.

    Have you ever thought about people's names? Where do they come from? What do they mean?

    People's first names, or given names, are chosen by their parents. Sometimes the name of a grandparent or other member of the family is used. Some parents choose the name of a well-known person. A boy could be named George Washington Smith; a girl could be named Helen Keller Jones.

    Some people give their children names that mean good things. Clara means "bright"; Beatrice means "one who gives happiness"; Donald means "world ruler"; Leonard means “as brave as a lion”.

    The earliest last names, or surnames, were taken from place names. A family with the name Brook or Brooks probably lived near brook(小溪); someone who was called Longstreet probably lived on a long, paved road. The Greenwood family lived in or near a leafy forest.

    Other early surnames came from people's occupations. The most common occupational name is Smith, which means a person who makes things with iron or other metals. In the past, smiths were very important workers in every town and village. Some other occupational names are: Carter — a person who owned or drove a cart; Potter — a person who made pots and pans.

    The ancestors of the Baker family probably baked bread for their neighbors in their native village. The Carpenter's great-great-great-grandfather probably built houses and furniture.

    Sometimes people were known for the color of their hair or skin, or their size, or their special abilities. When there were two men who were named John in the same village, the John with the gray hair probably became John Gray. Or the John was very tall could call himself John Tallman. John Fish was probably an excellent swimmer and John Lightfoot was probably a fast runner or a good dancer.

    Some family names were made by adding something to the father's name. English-speaking people added –s or –son. The Johnsons are descendants of John; the Roberts family's ancestor was Robert. Irish and Scottish people added Mac or Mc or O. Perhaps all of the MacDonnell's and the McDonnell's and the O'Donnell's are descendants of the same Donnell.

    Are you always disturbed by the noise made by your coworkers while you're working hard at your task? What kind of feelings will you have on hearing such kind noise? Have you ever got an idea that a certain helmet will help you out of the trouble no you can focus on your work at the office? Now, you needn't worry for the “Helmfon” will help you ignore noisy co-workers and other distractions.

    Created by Ukrainian design company Hochu Rayu, the Helmfon is a big helmet that uses special equipment to absorb the sound so as to completely block out any outside noise, giving the wearer their own quiet personal space so they can better focus their attention on their work. Made of a glass fiber shell, cloth and polyethylene（聚乙烯）, the helmet not only blocks outside sound, but it also keeps the noise you make in, allowing you to answer calls, hold Skype conferences, watch or edit videos, privately.

    The company came up with the idea for the Helmfon after being asked to design a new phone booth for an IT company. The project made the team think about the way we communicate and finally begin work on a device that would allow you to be in two worlds just sitting on your chair in the office, in a meeting, or everywhere you feel like just wearing your helmet.

    The Helmfon comes complete with a system board, microphone, speakers, and a special holder for your phone. The only trouble is that it makes you look like a character from Mel Brooks famous movie Spaceballs, but the company also made public a variety of great choices, including Bat man-inspired design, and even a Native American headgear.

    The Helmfon is still in prototype（维形）stage, but the Ukrainian company is already working on a commercially available design and plans to offer the design for sale. A release date has not yet been made public.

    One of the questions surrounding climate change is how it might affect the food supply for a growing global population. A new study suggests that researchers have been overlooking how two key human responses to climate—how much land people choose to farm, and the number of crops they plant—will affect food production in the future. The new study focused on the Brazilian state of Mato Grosso, an emerging（新兴的）global breadbasket（产粮地区）that as of 2013 supplied 10 percent of the world's soybeans. The researchers used variations in temperature and precipitation（降水）across the state over an eight-year period to estimate the sensitivity of the region's agricultural production to climate change. Those historical comparisons can help in making predictions about the sensitivity of agriculture to future climate change.

    The study found that, if the patterns from 2002 to 2008 hold in the future, an increase in average temperature in Mato Grosso of just 1 degree will lead to a 9 to 13 percent reduction in overall production of soy and corn. “This is worrisome given that the temperature in the study region is predicted to rise by 2 degrees by 2050,” said Avery Cohn, who led the study.

    Most studies of this kind look only at the extent to which climate shocks affect crop output. But researchers can miss critical dynamics（动力）that can affect overall output, says Leah VanWey, one of the study's senior authors. “If you look at output alone, you're not looking at all of the information because there are economic and social changes going on as well,” said VanWey.

    If output decreases, farmers may put less land area into production because it's not profitable. Farmers may also vary the number of crops they plant in a growing season. Double cropping is common in Mato Grosso. But if the weather is bad, farmers may change their decision to plant a second crop.

    I was reading these interesting stories behind a group of great logos in the world. Personally Nike is my favorite one—it's so simple. And I like the stories behind them, which made me forget all other things. McDonald's, Apple, Mercedes Benz and Adidas own great logos as well, and they are among my favorites.

    Nike

    In the Greek myth, Nike is the goddess of victory and the source of inspiration for soldiers. This logo represents the wing in the famous statue of the Greek goddess. Nike's logo was designed by Carolyn Davidson in 1971 for $35, and was registered as a trademark in 1995.

    McDonald's

    The logo was designed in 1962 by Jim Schindler to resemble the arch-shaped(拱形的) signs on the side of the company's then walk-up hamburger stand. Later on, the two golden arches were combined together to form the M. The McDonald's name was added to the logo in 1968.

    Apple

    There are different stories behind Apple's logo. The first logo was a reference to the religious story of Adam and Eve, in which the apple represented the fruit of the Tree of Knowledge. One year later, the second logo was designed in 1977 by Steve Jobs and Ronald Wayne, and it described Sir Isaac Newton sitting under an apple tree. This logo didn't stay long. One year later it was replaced almost immediately by graphic designer Rob Janoff's "rainbow apple", a rainbow-colored silhouette(轮廓) of an apple with a bite taken out of it. And then the rainbow-colored apple was replaced by the one-colored logo in 1998. It has not been changed so far.

    Mercedes Benz

    The Mercedes Benz logo, which was originally created by Gottlieb Daimler in 1909, consists of a simple description of a three-pointed star that represents its rule of the land, the sea and the air. The company was founded by Gottlieb Daimler and Wilhelm Maybach. Mercedes is the name of Maybach's elder daughter, while Benz came as a result of a combination with Benz, Cie and DMG in 1926.

    Adidas

    The Adidas logo, which was created by the founder of the company Adi Dassler, represents mountains, pointing towards the challenges that are seen ahead and goals that can be achieved. The logo was used for the first time in 1967.

    People speak English in different parts of the world. The same words can be used in different ways, depending on where you live. People can also have completely different ways of saying the same thing.

    The Oxford English Dictionary (OED) is asking the public to help it add new words. Editors want to find the regional differences in English around the world. They want to expand its record of the language.

    Last year, the OED, BBC Radio and the Forward Arts Foundation teamed up to find local words in the United Kingdom. It resulted in more than 100 regional words and phrases being added to the dictionary. One was "cuddy wifter", which means a left-handed person.

    Now, the OED is widening its search to English speakers around the world. Eleanor Maier, an editor at OED, said the response has been great. Editors are listing a bunch of suggestions to include in the dictionary.

    These include Hawaii's "hammajang", which means "in a disorderly state". Another is the word for a swimming costume, "dookers" or "duckers". It is used in Scotland.

    The OED also might include the word "frog-drowner", which Americans might use to describe a downpour of rain. Another possibility is "brick". It means "very cold" to people in New Jersey and New York City.

    The dictionary has already found that, depending on location, a picture hanging off center might be described as "agley". It might also be called "catawampous" or "ahoo".

    "The OED aims to cover all types of English," Maier said. That includes scientific words, slang and regional language. Maier also said that it can be difficult for the OED's editors to identify regional words. The terms are more often spoken than written down.

    The appeal is called Words Where You Are. It is looking for more suggestions. "We were surprised and pleased by the number of regional words we were able to include," said Maier.