You know how much your telephone has changed over the past 10 years? Your car will change even more than that in the next 10 years. One of the biggest changes is that cars will drive themselves.

    “We certainly have the technology for it now.”says Andrew Poliak of automotive（机动车辆的）technology supplier QNX.“We expect self-driving cars to be a mainstream thing between 2020 and 2025.”

    The American company Google has been working on self-driving cars for years. These cars are already on the roads in the United States and are truly self-driving. They have to steering wheels（方向盘）or pedals（踏板）. Last week, the police ordered one of Google's cars to stop for driving too slowly on a public road. The car was not breaking any law, so no one was punished.

    Another American company, Tesla, added an “Autopilot” feature to its cars last month. With the Autopilot turned on, the vehicle drives itself. The car will speed up, slow down, brake and drive by itself. You can take over driving any time by turning the steering wheel or touching a pedal. The car uses sensors（感应器）to know when driveway changing is safe and whether it should speed up or slow down.

    Tesla Autopilot is made for cross-country driving. It keeps you in the driveway and helps you avoid hitting other cars. It does not work well on local roads, for it will not stop at a red light or stop sign.

    Reporter Carolyn Nicander Mohr tried the Autopilot feature of a Tesla earlier this month. She had a hard time trusting the car to do what it should do. She thought about disabling the Autopilot feature many times during her trip. She wanted to take control at every bend in the road and hit the brake when the car in front of her slowed down. Yet the car drove perfectly.

    Other companies are working on self-driving cars, too. Marcedes-Benz, Audi, BMW. Volvo and Toyota all have plans for such vehicles.

Old new medicines

What should you do if you have a headache? In modern times, people often take aspirin（阿司匹林）. But is aspirin {#blank#}1{#/blank#}(actual)a modern medicine?

More than 4,000 years ago, ancient Egyptians used dried leaves to treat pain. And in the fourth century B. C., a medicine made from tree bark（树皮） {#blank#}2{#/blank#}(use) to treat fevers. In the nineteenth century, European scientists discovered that both medicines have the same chemical（化学物质）. They used the chemical to make a modern medicine—aspirin. Today, it's one of the world's{#blank#}3{#/blank#}(cheap) and most helpful medicines.

Some of the medicines we have today come {#blank#}4{#/blank#} traditional Chinese medicine. In the third century B. C. , some people {#blank#}5{#/blank#}(begin) studying the human body. They tried many different ways to treat the patients and recorded {#blank#}6{#/blank#}(they) results. For more than 2,000 years, doctors recorded {#blank#}7{#/blank#} they found in books. These ancient books are still useful today. Tu You you, a Chinese medical researcher, found that in {#blank#}8{#/blank#} past, people used a herb with yellow flowers to treat fevers. After studying it, she developed a medieine that saved millions of people from dying.

For {#blank#}9{#/blank#}(century), Western medicine paid little attention to traditional Chinese medicine. But today, scientists are studying traditional treatments {#blank#}10{#/blank#}(develop ) new medicines.

The Chinese ancient tea ceremony(仪式) is a practice of preparing, serving, and enjoying tea. It might start in the Tang Dynasty or even earlier and it reached its greatest time in the Song Dynasty. The traditional Chinese tea ceremony is usually held in important situations to welcome guests.

Main steps:

*Prepare a tea set. To hold a Chinese tea ceremony, a full tea set is needed, including a teapot, a serving bowl, cups, plates, etc.

*Heat the tea set. This step can help tea fully give off its nice smell.

*Put tea leaves into the teapot. Use the teaspoon, not the hand, to place some tea leaves into the teapot.

*Wash tea leaves. Pour the hot water into the teapot and keep it for a few seconds, and then pour out water quickly.

*Brew tea. Refill the teapot with hot water of a proper temperature, cover it and wait for a few minutes to keep the pleasant smell of the tea soup.

Manners and rules:

If you are the host, please:

*Serve the tea with both of your hands.

*Do not fill the teacup fully, since the hot tea soup might hurt the guests.

*Keep an eye on the teacups of your guests and fill them in time.

If you are the guest, please:

*Receive the teacup with both hands when being served with tea.

*Show your admiration and thanks to the host when smelling or drinking the tea soup.

*Take a small mouthful of tea soup every time instead of drinking it up at a time.

*Dress properly to attend the tea ceremony.

Do you see "dopamine dressing （多巴胺穿搭）" on Douyin or Xiaohongshu？It's one of the most popular fashion styles （时尚风格） for 2023.Now，many people take this style to fight back （反击） bad feelings and show themselves.

The meaning of dopamine dressing

A US fashion psychologist （心理学家） Dawnn Karen gives the name "dopamine dressing".Dopamine dressing uses bright colors like pink，yellow and green.Because they bring happy feelings to people.

The science behind color

Science shows that different colors can make people feel different.For example，bright colors can make people feel happy.The colors like black，white and gray may make people sad.

Getting popular in fashion world

Some fashion brands （品牌） use different colors in different ways.For example，Versace，an Italian brand，also uses the idea of dopamine dressing to their clothes.It says this could bring fun and surprise to the world through fashion.

Tips （小贴士） for dopamine dressing

If you want to try dopamine dressing but think it's too much，you can try one thing at a time.

*Bags：With black and white clothes，you can use a bright pink or yellow bag.

*Shoes：You can light up your dark （暗色的） clothes with a pair of red shoes.

*Socks：Colorful socks can make you look cute.