Did you know that your small intestine is nearly six meters long? Or that there are about 60 muscles in your face, and you use 40 of them to frown but only 20 to smile? How about the fact that our bodies consist of 73 percent water, and that our hearts beat over 100,000 times each day? 

        The human body is an amazing and also complex machine. From the day we are born, our bodies grow and change in response to our environment, diet, and habits. The body has many different organ systems and parts that work together to allow us to breathe, move, see, talk and digest food all at the same time. Most of the time we are unaware of what is happening in our bodies; usually it is only when we get sick or feel pain that we notice. 

         Like machines, different body parts sometimes wear down from old age. People over the age of 65 are more likely to fall and hurt themselves, and these injuries—from bad cuts to broken bones—usually require serious medical attention. Due to the increase in the population of elderly people, gerontology is now one of the fastest growing areas of medicine. There are many treatments available to help older people recover from illness and injury. It is now common for older people with damaged joints, for example, to have surgery to replace the old joint with a new one made of plastic or metal. Instead of suffering aches and pains through their retirement days, older people are able to lead happier and more comfortable lives.

    The English language has many expressions about the weather。One famous phrase is，“March comes in like a lion and goes out like a lamb." In many western countries early March is a time of cold and windy weather. People compare this wild weather to a wild lion. In contrast，the weather in later March tends to be far milder. People compare this gentle weather with a lamb.

    Another famous phrase says that，“April showers bring May flowers."While the weather in April is often rainy, the phrase reminds people that the rain will bring benefits in the end. Without the rain，the beautiful wild flowers that grow in May would not grow。

    Have you ever heard the phrase, “Red sky at night，shepherd's delight, red sky in the morning, shepherds take warning”？ The phrase is actually a surprisingly accurate way of forecasting the weather. When the sky is red at night，it often means good weather Is on the way。As a result，shepherds — farmers who take care of sheep - will be happy. In contrast，a red sky in the morning often means bad weather is on the way. Shepherds and others who work outside should take a red sky in the morning as a serious warning.

  A new study, published by the Rapid Transition Alliance(RTA), has revealed that climate change will threaten worldwide sports events over the next three decades. RTA monitors climate change, development and global issues. Researchers said that nearly all sports would be impacted by what they called "an accelerating climate crisis." They highlighted how the weather has already messed up major sports events. Bushfires in Australia made playing conditions hazardous at the Australian Tennis Open and drenching rain from a huge typhoon disrupted last year's Rugby World Cup in Japan. The report predicts that fires, floods, heatwaves and rising sea levels will cause greater disruption. 

  Andrew Simms, the coordinator of RTA, urged the sports industry to do more to become carbon-neutral. He said: "Sport provides some of society's most influential role models. If sport can change how it operates to act at the speed and scale necessary to halt the climate emergency, others will follow." He added that the carbon emissions from sports events worldwide are equal to those produced by a medium-sized country. The report's author, David Goldblatt, said sport should be more proactive. He said: "Making a carbon-zero world the common-sense priority of the sports world would make a huge contribution to making it the common-sense priority of all politics."