Wind power is a very clean source of energy. This is how wind power works. Wind makes windmills spin. When the windmills spin, they make electricity. Then we can use the electricity.

A lot of people think that wind power is new, but that is not true. 【小题1】 We still do those things today, but these days we mostly use wind power to make electricity.

Wind power is a very popular source of energy. First of all, it is clean. 【小题2】 Second, we can use wind power forever. After all, we will always have wind. Also, wind power is cheap and it’s getting even cheaper.

A lot of people don’t understand wind power very well. They believe that there are problems with wind power, but many of these problems are not real. 【小题3】 That used to be true, but it isn’t true any more. Old windmills used to kill birds because they spun very fast. New windmills spin slowly and they aren’t dangerous for birds.

【小题4】 One problem is that many people think windmills are very ugly. This is a problem for some people, because windmills are often in very pretty areas. Also, wind doesn’t blow all the time, so we can’t use wind power all the time. Finally, windmills are noisy.

Wind power is becoming more and more common. Right now, more than 80 countries use wind power.

【小题5】 For some countries, that number is a lot higher. Wind power gives Denmark more than 25 percent of its electricity.

Twinkle, Twinkle Little Star is a lovely song for children, but it has two misunderstandings (误解). First, stars aren’t little. Some may be Earth-sized, but most are bigger than Jupiter, the largest planet in the solar system (太阳系). Second, they don’t twinkle; they shine. And the brightness and color of the light from each star provide information about its temperature, size and even its age. viewing the stars from Earth is a bit like looking at them through a water filter (过滤器) because the air is thick compared to the emptiness of space. What is more, air is always moving, so starlight appears to be moving, too. The air also makes stars appear dimmer (暗淡的) than they would be if we could see them from space.

If you stop and look at the sky carefully on a dark and moonless night, it’s easy to find color differences among stars. The color of a star is a signal of its surface temperature. The hottest stars are blue, and the next hottest are white. Yellow stars like the sun are next, while red stars are the coolest of the visible (可见的) stars. Many red stars are so dim that people can’t see them at all, and some stars hardly send out any light at all. One reason that stars different in brightness is that hotter stars produce more energy than cooler ones, but another important reason is that some are much bigger than others.

Some stars appear brighter to humans simply because they’re closer. Astronomers rank (排列) the brightness of stars which are seen from Earth by giving them a name known as magnitude (光度) ---the smaller the magnitude, the brighter the object. They have also designed a number that ranks stars according to how bright they are when compared to each other. With a magnitude of minus 26.7, the sun is the brightest object in the sky.

Do you know the two lovely mascots? You may know the five “Fuwa” dolls from the 2008 Beijing Olympic Games. On September 17 of 2021, the two lovely mascots first showed on TV. Now, let’s see who they are.

	Look at the panda! It looks like an astronaut. It wears an ice shell and looks fat, so we call it “Bing Dwen Dwen”. White is the colour of ice and snow. “Bing Dwen Dwen” likes ice sports very much and is good at them. That’s why it is the mascot of 2022 Beijing Winter Olympic Games.
	Do you think the red mascot looks like a lantern? The lantern’s name is “Shuey Rhon Rhon”. When the Chinese New Year comes, people always make or buy red lanterns. Red is the colour of hope and good luck, so people think their dreams will come true in the new year. “Shuey Rhon Rhon” can give players hope and help them do well in the 2022 Beijing Winter Paralympic Games.

Many people in different countries like the two mascots very much, and they show their love to them on the Internet.