Bats are the only “flying animals” in the world. They can't see very well. We often hear “as blind as a bat”. Yet they have no trouble flying on the darkest nights and finding their ways round. How can bats fly and see at night? They fly by radar(雷达).

The bat's radar system(系统) works the same way as the radar in ships and planes. As a bat flies through the air, it makes a sound. If the sound hits things, it will come back and the bat's ears will receive the message. In this way the bat is able to know where the things are. Bats go out for food at night. In the daytime they hang in some dark places. Some people think bats are bad animals. In fact they are useful animals.

    Laughter is natural for people. We start to laugh at about four months of age. We start to laugh even1 we start to speak.

    Laughter connects us with others. We laugh more when we are with other people. It's difficult to pretend to laugh. Laughter is2. When people pretend to laugh, most people know it's not real.

   When do people laugh?

    Only 10 to 20 percent of laughter is about something3. Most laughter is about being friendly with other people. Most laughter says, "I don't want to4 with you. I want to be friendly with you." This kind of laughter brings people together.

    We often laugh when we feel nervous. In movies, there is often a joke at an exciting moment when everyone feels nervous. It is usually a(n)5 joke, but we laugh a lot. Our laughter helps us6.

   Why doesn't everyone laugh at the same joke?

    Not everyone has the same sense of7. Some people think a joke is funny, but other people don't think so. People have different ideas about what is funny.

    Our idea of what is funny changes with8. For young children, the world is new. They are interested in many things, so they laugh9. Teenagers often laugh to protect themselves. Adults laugh at themselves and other people with similar problems. They laugh at things that give them stress. Our10 for laughter change gradually.

 There are several Chinese sayings that are similar to" how time flies". Ancient Chinese compared time to many things.

 One of {#blank#}1{#/blank#} ( popular) sayings is probably"光阴似箭, 日月如梭( Time flies by like an arrow; Days and {#blank#}2{#/blank#} ( month) flash by as fast as a weaver's shuttle.)" It is easy {#blank#}3{#/blank#}( understand) the" arrow" part. All of us know {#blank#}4{#/blank#} fast arrows are. What about a weaver's shuttle?

In ancient times, many Chinese people made a living by growing crops (庄稼) and weaving cloth(织布). Nearly every family {#blank#}5{#/blank#} ( have) a loom(织布机). A shuttle is a tool on the loom that moves {#blank#}6{#/blank#} ( quick) when someone is weaving. Since it was so often seen, ancient Chinese used it in this saying.

 Another popular Chinese saying {#blank#}7{#/blank#} the passing of time is"白驹过隙". It means that time flies by like a white horse running past a crack (缝隙) in a wall. The saying comes from {#blank#}8{#/blank#} book called Zhuangzi. In this book, it is said that Confucius came to Laozi to ask about the ultimate(终极的) truth of the universe. Laozi told Confucius that a {#blank#}9{#/blank#} ( person) life was as quick as"a white horse running past a crack". One's body would die, {#blank#}10{#/blank#} his or her spirit could live on forever.

1. 科技发明①;

2. 科技发明②;

3. 对美好校园生活的祝愿。

注意：

1. 词数80词以上;

2. 文章开头已给出， 可适当增加细节， 以使行文连贯；

3. 文中不能出现真实姓名及学校名称；

4. 不得抄袭课文或其他文章。

参考词汇: campus(n.校园), application (n.应用)

Smart Campus in the Future

Ladies and gentlemen, with the development of AI technology, we are marching towards a new era for our school.