It is hardly surprising that clothing manufacturers (生产商)follow certain uniform standards for various features(特征)of clothes. What seems strange, however, is that the standard adopted for women is the opposite of the one for men. Take a look at the way your clothes button. Men's clothes tend to button from the right, and women's from the left. Considering most of the world's population—men and women—are right-handed, the men's standard would appear to make more sense for women. So why do women's clothes button from the left?

    History really seems to matter here. Buttons first appeared only on the clothes of the rich in the 17^th century, when rich women were dressed by servants. For the mostly right-handed servants, having women's shirts button from the left would be easier. On the other hand, having men's shirts button from the right made sense, too. Most men dressed themselves, and a sword drawn from the left with the right hand would be less likely to get caught in the shirt.

    Today women are seldom dressed by servants, but buttoning from the left is still the standard for them. Is it interesting? Actually, a standard, once set, resists change. At a time when all women's shirts buttoned from the left, it would have been risky for any single manufacturer to offer women's shirts that buttoned from the right. After all, women had grown so used to shirts which buttoned from the left and would have to develop new habits and skills to switch. Besides, some women might have found it socially awkward to appear in public wearing shirts that buttoned from the right, since anyone who noticed that would believe they were wearing men's shirts.

    If you can speak English，you know a lot of English words. You can read，speak and understand. But there is another kind of language you need to know——the language of the body，a part of what is called non-verbal communication. All over the world，people “talk” with their eyes. When Japanese people meet，they put their hands together. What do American and British do?

    Americans are more informal than the British. They like to be friendly. They use first name，they ask questions and they talk easily about themselves. When they sit down，they like to relax in their chairs and make themselves comfortable.

    British people are more quiet. They take more time to make friends. They like to know you before they ask you home.

    When British and American people meet someone for the first time，they shake hands. They do not usually shake hands with people they know well. Women sometimes kiss their women friends，and men kiss women friends （on one cheek only）.When a man meets a man friend，he just smiles，and says “Hello”. Men do not kiss each other. Even fathers and sons do not often kiss each other.

    At schools across the United States, students often sit down to cafeteria lunches made from processed foods that are high in fat, sodium, and sugar. But kids at Public School(P. S. )216 in Brooklyn have a different dining experience. Principal Donna Neglia reports that her students love eating fresh fruits and vegetables.

    P. S. 216 participated in the Edible Schoolyard Project, a nonprofit program founded by Chef Alice Waters in 1995. The program that Waters created helps public schools across the country start on-site gardens and weave principles of healthy eating into the curriculum. Students grow and maintain crops, harvesting the fruits and vegetables for cafeteria meals.

    Waters expressed her passion for the principles of the farm-to-table movement. She advised schools to connect with the farmers in their area and change their buying practices when planning meals for students.

    Waters has long been inspiring people to care about where their food comes from. In 1993, she put forward the idea of a White House vegetable garden. It was not until 2009 that Michelle Obama started the garden in the backyard of the White House. She and members of the kitchen staff spent hours tending to the garden, often with help from local school children.

    “That gave people a sense that she cared about children and cared about where our food comes from,” Waters said, praising the former First Lady's concern for young people's health. “We are just building this movement, and it is very exciting. ”

    “Through the Edible Schoolyard Project, students also learn about the benefits of healthy eating in the classroom.” Neglia said. “P. S. 216 is teaching kids about careers in the food industry—such as farming and agriculture, nutrition, food safety, and the restaurant business.”

    Similar classes are taking place around the country. So far, the Edible Schoolyard Project has reached more than 1 million students in more than 367 schools. “I'm thinking about the future of the planet,” Waters said. “I'm doing this for our generation.”

    Tablets(平板电脑) are useful devices, but their big screens always make them as a burden to carry around without a bag. Wouldn't it be great if there were a phone with the powers of a tablet that could be folded up and fit neatly into the hand? Now something like a tablet-shaped but foldable(可折叠的) phone is about to become available. In February, Samsung and Huawei both introduced foldable phones, the Galaxy Fold and Huawei Mate X separately, to the public for the first time. Mobile phone use has entered the "foldable future", the Verge noted.

    The technology could change our lives in significant ways. These devices, due to their bendable screens, give us the larger screens we want but still fit easily into the pocket. The technology could change other devices too. For example, we could make TVs that stick to walls like posters, or fold up easily to hide away in drawers, which could help increase available space to the maximum. In a keynote address, Justin Denison, Samsung's senior vice president, called the foldable screen "the basis for the smartphone of tomorrow". "It's a blank canvas (画布) for us to do something beautiful together," he said.

    So is there nothing to stand in the way of the foldable future? According to tech news website Android Authority, the necessary displays were difficult to produce. In 2012, nine out of ten foldable screens produced were defective or unusable. Today, that 10 percent rate has been improved to almost 90 percent. However, at present these foldable devices are expensive. For example, the price of Huawei Mate X is 17, 500 RMB. That's a price that few people will be able to afford.

    But if the foldable device isn't going to change the world overnight, there is no doubt that it is coming. Patrick Moorhead, an industry expert told The Verge, "Few are debating if foldable mobile displays are the future of smartphones; the only question is when and by whom."

    "An apple a day keeps the doctor away" is one of the most common sayings in the English languages. This is because apples were one of the first foods that medical professionals recognized as healthy­their benefits became obvious when  quite simply, doctors found that people who ate apples were sick less often than those who did not. Today we have a more specific understanding of why apples are so beneficial to overall health.

    Apples can help keep your levels of bad cholesterol (胆固醇) down. The pectin (果胶) in apples helps you to maintain cardiovascular health and reduce LDL cholesterol(which is the "bad" kind). Apples themselves do not add cholesterol to your diet and are full of water and fiber to help prevent the cholesterol in other foods you might digest. According to Health Diaries, people who eat two apples per day may lower their cholesterol by as much as 16 percent.

    Apples are naturally low in calories and high in water content. Eating an apple can satisfy your hunger and keep you from reaching for high-sugar, high-calories snacks. By eating apples, you will be more able to maintain a healthy weight because they fill you up, potentially stopping you from eating food that encourages a waistline increase.

    Apples contain respectable levels of boron (硼) which helps build healthy bones, and can also prevent diseases like arthritis. Apples are rich in vitamin C, which is known to help build immunity.

    Studies have shown that apples can decrease the risk of breast cancer, colon cancer, and liver cancer. One theory is that the apple skins are responsible for this, so be sure not to peel your apple before you eat them, as you could remove some of the health benefits.

    Memory, they say, is a matter of practice and exercise. If you have the wish and really make a conscious effort, then you can quite easily improve your ability to remember things. But even if you are successful, there are times when your memory seems to play tricks on you.

    Sometimes you remember things that really did not happen. One morning last week, for example, I got up and found that I had left the front door unlocked all night, yet I clearly remember locking it carefully the night before.

    Memory "tricks" work the other way as well. Once in a while, you remember not doing something, and then find out that you did. One day last month, for example, I was sitting in a barber shop waiting for my turn to get a haircut, and suddenly I realized that I had got a haircut two days before at the barber shop across the street from my office.

    We always seem to find something funny and amusing in incidents caused by people's forgetfulness or absent -mindedness. Stories about absent -minded professors have been told for years, and we never get tired of hearing new ones. Unfortunately, however, absent -mindedness is not always funny. There are times when "tricks" of our memory can cause us great trouble.