Quince, a restaurant in San Francisco, is serving a dish called "A Dog in Search of Gold" on an Apple iPad that's playing a video of a dog hunting for truffles (松露). If you're wondering about the connection, the dish is composed of white truffle croquettes (油炸丸子).And in case you're not into truffles, Quince also serves frog legs on top of iPads playing videos of frogs in a pond.

    "The idea is simply about taking the guest on a voyage," Michael Tusk, who runs the restaurant, told Inside Scoop SF. "Living in San Francisco for over twenty years, I have seen the technological development, and I want to combine (结合) food industry with technology and a Me bit of education." Local chef Richie Nakano attracted the attention of social media after showing a photo of the UA Dog in Search of Gold" that a friend had ordered. Some people complained about the high price of the dish, but most wondered whether it was healthy.

    Tusk said, "We asked local wood worker Luke Bartels to create a housing (防护外壳) for the iPad — a glass cover that protects the screen. The food does not directly sit on top of the iPad. The cover is washed after every use."

    Interestingly, Quince is reportedly the first U.S. restaurant to use iPads as plates, but definitely not the first in the world. The Daily Mail reports that restaurants in the UK have been using them for the last two years.

Medflies (果蝇) are a big headache for farmers worldwide. They can lay their eggs in over 300 kinds of fruits and vegetables. The worst thing is that when they make their way into an area, it is hard to keep the products free of them.

Medflies lay eggs inside the poor fruits or vegetables. When the eggs break, they turn into worms that can seriously damage the products. The problem is that it can be hard to know that the flies are there until it's too late. The fruits and vegetables still look normal even after the eggs are laid inside. Once the damaged fruits and vegetables are sent to other places, the Medflies spread and reproduce at a surprisingly fast speed.

In the 1980s, three Medflies were found on a farm in California. To stop the problem from spreading, the local government set up a quarantine area (隔离区) where no fruits, nuts, or vegetables can be moved out. Meanwhile, it developed a program to keep Medflies under control. The plan involved using planes to spread millions of male Medflies out over the area. According to the scientists, these Medflies all have been treated with a special method to make sure that they can't help produce new Medflies. That means even though new eggs are laid, they will never grow.

Dropping millions of Medflies sounded like a bad idea, but to everyone's surprise, the program worked well. The government says the number of Medflies in California has shrunk by over 90%. Now we can fight Medflies with Medflies!

It's not an easy thing to speak out how we really feel sometimes. An English teacher from Fremont, California thought of a creative * way to help her students express their feelings. 

Erin Castillo is a special education * teacher. She made a "mental health checklist(心理健康诉查表)"for her students. The checklist asks kids if they are "Great", "OK", "Meh", "Struggling(挣扎)" "Having a hard time" or "In a really dark place". Each student needs to write his name on the back of the paper and put it in the section describing how he is feeling. If he puts it in the "Struggling" section, he knows he should talk with friends or parents. If he is "Having a hard time" or "In a real dark place", Castillo will talk with him. Also, Castillo made a table for "Coffee Time" Students can sit it at the table and work quietly and independently *. They can listen to music, have a snack or enjoy some "me-time". "It is important for teachers to create a classroom where students feel safe to communicate with others, "Castillo said. 

My hometown Nanjing is in the eastern part of China.As the capital of Jiangsu，it is a modern and busy city.And it is one of the cities with the longest history in China.With the development of the economy（经济），it has changed a lot in the past few years.

For one thing, people took tramcars (有轨电车) to go out in the past. But now many people choose to take a subway because of its convenience (便捷). What's more, taking a taxi becomes very popular. It has an app on the phone, and some people use it to call a taxi. It may be much cheaper.

Besides，the building is different from the past.In the past，the tallest building in Nanjing was Jinling Hotel.It had 37 floors.At that time，the tallest building is Zifeng Tower.It has 78 floors.Different from the past，you can see tall buildings everywhere in Nanjing.

As for the environment，in the 1980s and before，Nanjing was full of trees，people paid little attention to the importance of plants and fresh air.Plants were cut down and the air got worse. Now, to improve the living place, people take all actions to grow plants and cut down pollution. The environment is getting better now.

Thousands of years ago, in the south of ancient China, there lived Shen Nong,a man who had an ox(牛) head and a human body. Seeing that local people were suffering from diseases, he built ladders and houses on a high mountain to store hundreds of medical plants. To remember him. people named the place Shennongjia.

The legend(传说) makes Shennongjia in Hubei an inviting place for tourists. Traveling there is a unique experience, as you can see scenery of the four seasons from different altitudes.

" When the bottom of the mountain is summer, the top is spring and while the foot of a hill is autumn, the top is covered with ice," local people speak of the special climate of Shennongjia.

Shennongjia is also home to thousands of species of animals and plants. Many endangered animals live there, such as the golden monkey, the clouded leopard and the Asian black bear.

One interesting and mysterious thing about Shennongjia is its legend of wild men. Some people once claimed that they saw big prints or big- foot creatures. Yet so far, scientists haven't proved that it is true and some say they are just bears.

The beautiful place has received a new title. On July 17,2016, Shennongjia Forestry District was added to the World Heritage List as a natural site. China now has 56 world heritage(遗产) sites, second only to Italy in the world.