Are you the type of person who always says “yes”? I've come to learn that it is very important to learn to say NO! It's okay. People are still going to like you. They may even respect you more because they know you are honest.

    I'm not saying to say “no" to someone who really needs your help. I'm talking about refusing that meeting that you really do not want to attend or that birthday party that you don't want to be a guest at.

    Think for a moment how you feel when you say YES to something that you really don't want to do. If you're like I once was，you can't sleep at night and you think about it too much. It weighs on your mind. You try to find ways out. Whatever you're saying to yourself, if you really wanted to go, you wouldn't have all of these thoughts.

    So, why not just say NO from the beginning? Maybe you feel like if you don't show up at the meeting (by the way, it is not one you must attend) your boss isn't going to like you or your co-workers won't respect you. Maybe you feel as if your mom, dad or sisters won't love you as much if you don't do everything for them that they ask every occasion.

    If these people are your true friends, family members, or a good boss, they will like or love you the same no matter what. People treat you the way you usually use, and if you're someone who always says “yes” then that's what they're expecting.

You need to do what is right for you. Of course we do have real responsibilities in life to do, but we do not have to do everything others want us to do.

    We all know what a brain is. A doctor will tell you that the brain is the organ of the body in the head. It controls our body's functions, movements, emotions and thoughts. But a brain can mean so much more.

    A brain can also simply be a smart person. If a person is called brainy, he is smart and intelligent. If a family has many children but one of them is super smart, you could say, "He's the brains in the family." And if you are the brains behind something, you are responsible for developing or organizing something. For example, Bill Gates is the brains behind Microsoft.

    Brain trust is a group of experts who give advice. Word experts say the phrase "brain trust" became popular when Franklin D. Roosevelt first ran for president in 1932. Several professors gave him advice on social and political issues（问题）facing the U.S. These professors were called his "brain trust".

    These ways we use the word "brain" all make sense. But other ways we use the word are not so easy to understand. For example, to understand the next brain expression, you first need to know the word "drain". As a verb, to drain means to remove something by letting it flew away. So a brain drain may sound like a disease where the brain flows out the ears. But, brain drain is when a country's most educated people leave their countries to live in another. The brains are, sort of, draining out of the country.

    However, if people are responsible for a great idea, you could say they brainstormed it. Here, brainstorm is not an act of weather. It is a process of thinking creatively about a complex topic. For example, business leaders may use brainstorming to create new products, and government leaders may brainstorm to solve problems.

    If people are brainwashed, it does not mean their brains are nice and clean. To brainwash means to make some accept new beliefs by using repeated pressure in a forceful or tricky way. Keep in mind that brainwash is never used in a positive way.

    The best bikes for the beginners

    When it comes to purchasing your first bike, the choice is endless, making it tough to know what to go for. Here are the best buys on the market right now.

    Boardman CX Comp

    This is a cross-country bike, and it's so versatile(多用途的)that you can handle any terrain(地势)on it, making it a great choice for those wanting to try various cycling subjects. If you leave on the thick tires it comes with, it can ride on various paths and can even handle some less demanding mountain bike routes. Alternatively, put on thin, slick tires and treat it as a road bike. It has basket and comes with Shimano Sora gears(齿轮), which are outstanding for its price.

    $650, Halfords

    Planet X RT-58 v2

    Planet X is based in Yorkshire, which means you'd probably have to buy this bike without seeing it. But it's worth it, because this is an excellent machine at a lower price. Planet X is a highly rated manufacture and this model comes with Shimano Sora gears.

    $439, Planet X

    Specialized Allez ES

    Specialized is one of the biggest and most popular brands in cycling, and this is its hugely popular primary road bike. It comes with solid components from front to back and you'll look great out on the road.

    $575, Evans Cycles

    Boardman Road Team Carbon

    If you can push budget further still, this bike is worth the extra investment. The frame is made entirely from carbon, which is lighter, faster and more comfortable than the composition metal models above and gives you an all-round more enjoyable ride. It also means that if you get really serious about cycling, you don't have to upgrade as quickly as you would with a cheaper bike.

    $800, Halfords

    People have grown taller over the last century, with South Korean women shooting up by more than 20cm on average, and Iranian men gaining 16.5cm. A global study looked at the average height of 18-year-olds in 200 countries 1914 and 2014. The results show that while Swedes were the tallest people in the world in 1914, Dutch men have risen from l2th place to claim top spot with an average height of 182.5cm. Larvian women, meanwhile, rose from 28th place in 1914 to become the tallest in the world a century later, with an average height of 169.8cm. James Bentham, a co-author of the research says the global trend is likely but once you average over whole populations, genetics plays a less key role," he added.

    But while height has increased around the world, the trend in many countries of north and sub-Saharan Africa causes concern, says Elio Riboli of Imperial College. While height increased in Uganda and Niger during the early 20th century, the trend has reversed in recent years, with height decreasing among 18-year-olds.

    "One reason for these decreases in height is the economic situation in the 1980s," said Professor Alexander. The nutritional and health problems that followed the policy of structural adjustment, he says, led to many children and teenagers failing to reach their full potential in terms of height.

    Bentham believes the global trend of increasing height has important implications. "How tall we are now is strongly influenced by the environment we grew up in," he said. "If we give children the best possible start in life now, they will be healthier and more productive for decades to come."

    There is always no lack of ordinary people taking action for extraordinary change. Aghan Oscar is just among them. Thirteen years ago, Aghan bothered by the ever-increasing quantity of plastic waste in this low-income suburb of Nairobi, decided to find a way to recycle it.

    Nou his company. Continental Renewable Energy Co.Ltd(COREC) produces poles for use in construction, farming and road signs. So far he's sold 96,000, and he says his potential or growth is limited only by the considerable expense of setting up plastic recycling plants.

    Most of Aghan's customers are farmers and developers who once used wooden fence poles. Customers say they have other benefits as well. "I have fenced my piece of land three times using wood posts, but most of the time the fence was vandalized(故意破坏)by villagers who used the posts as firewood." said Caleb Kapten. Now plastic posts have stopped the problem, he said.

    The Kenya National Highways Authority is one of COREC s biggest customers. It approached the company after road signs were vandalized by criminals who sold the metal poles to steel manufacturing companies. Aghan reckons (估计)that COREC's products have saved the government millions of shillings, besides preventing road accidents. And he also points out that COREC has been able to conserve large numbers of trees by producing plastic poles.

    When Aghan started this recycling business in 2003, most of his employees were his family members due to financial constraint(限制).Now he employs 250 young people to collect plastic waste. Fifty more youths work on the production line, where the waste is sorted according to quality before being crushed and washed, melted and cast into different shapes. The poles arc then arranged by shape and size for sale in the yard of the recycling plant.

As an only child, Nicole Renae often felt lonely in her youth. But that all changed when she turned ten. For her birthday, Renae's grandmother 1 her with an adorable gray 2 named Chloe.

From the very start, the two were 3 . "She was my best friend," Renae said. Every ounce of love Renae gave, the little dog returned tenfold.

But when Renae was 14, her father 4 a new job that came with a shocking warning: He'd be working at home, and the house needed to 5 noise disturbance.

"Chloe was very noisy," Renae said. "I was just a kid, so I didn't have any 6 in the matter. I didn't want to 7 my dog. I just felt so sick and 8 about it. With no easier option, the family sent Chloe to a humane society.

9 , Renae grew up, got married, and had a child of her own. But her family didn't feel quite complete. Remembering the 10 that having a dog had brought her as a kid, Renae wanted her daughter to 11 the same. She had it in her mind that she would 12 a puppy, but then one day she saw a post on a social media platform about a 13 dog that needed a new home. The dog in the photograph looked a lot like Chloe —she was even named Chloe. In an instant it was 14 : She would adopt this older dog.

When she met Chloe, the dog seemed so familiar. And Chloe appeared to feel the same 15 about Renae. Soon Renae cried with excitement because she felt so lucky to have Chloe again.