3 . Many libraries around the world are as amazing in their architecture and organization as they are in the huge amount of knowledge they contain. With shelves and shelves of books, various collections and amazing historical and cultural displays. there are plenty of undiscovered wonders.

Beinecke Rare Book Library (New Haven, Connecticut)

Yale University has one of the most beautiful college campuses in America, and one of its most interesting features is the Beinecke Rare Book Library. It is one of the largest buildings in the world devoted to rare books and manuscripts (手稿) of famous people. From 2015-16 the library building was closed for 18 months for major improvement. Inside there is a stat ue of its main founder that rises up high.

Vennesla Library (Vennesla, Norway)

Located near the southernmost tip of Norway, Vennesla Library is more than a collection of books—it’s a city cultural center and meeting place. The building hosts a coffee shop, open meeting spaces, classrooms for children and adult education courses. and a cinema. It is mainly built out of wood. The long. thin beams (横梁) on the inside were designed to look like the inside of a whale.

Suzzallo Library (Seattle)

Among the many beautiful features of the campus at the University of Washington, such as its cherry flowers and a light rail station, Suzzallo Library was built in the Collegiate Gothic style. Its buttresses (扶壁) are decorated with 18 statues featuring famous academics and writers such as Plato, Shakespeare, Leonardo da Vinci, Dante, Galileo, Beethoven, Isaac Newton and Charles Darwin.

Library of Muyinga (Muyinga, Burundi)

A school for deaf children, the Library of Muyinga in Burundi was built with local techniques and traditions. A rope hammock (吊床) that hangs between the first and second floors of the library serves as part of the children’s reading room, a great place for indoor activities.

More information of them is just a click away.

6 . When it comes to technology, adults won’t be able to keep up with their children. It took radio 38 years to reach 50 million people, but it took only 20 years for the phone to reach the same number, and 13 years for the television. However, it took Facebook 3.6 years and Twitter only needed 88 days. Over the last 15 years, digital communication has brought in more changes than the printing press did in 1570. And those most likely to use them in this world are teenagers, whose brains appear to have a great ability to adapt to the world around them, according to Dr. Jay Giedd, a brain expert.

We are now discovering that our brains during the teenage years are still flexible (灵活的). Having a more flexible brain means that certain functions of it , such as the ability to make long-term decisions, haven’t developed yet, which may also explain why we spend a long period living under the protection of our parents rather than leaving home at the age of 12 or 13. This also means that the teenage brain can adapt to new technology, allowing teenagers to keep up with the increasing pace (速度) of digital technology, giving them an advantage when doing different tasks.

As they look at these screens, they’re dealing with information. There are concerns about how social media is affecting the way in which the brain learns to socialize. Giedd says that a lot of what goes on inside our brains is social. Social interactions are being changed by technology - you could have hundreds of friends, all of whom are real people that you interact with and scientists aren’t sure whether we’ll be able to develop the same skills using social media.

There is an advantage to the growing digital trend (趋势)：YouTube shows that teenagers all over the world are watching the same things and laughing at the same jokes, showing that they are more global-minded than teenagers in the past. They are more open to other cultures, other countries, and other people.

Wandering sounds, irregular rhythms and a carrier of gentle emotions define the musical language of guqin, a seven string instrument created in ancient China.

The earliest piece of guqin in China,     1     (discover) in Hubei province in 2016, dates back to the Zhou Dynasty. The body of a guqin is made of lacquered (上漆的) wood and the strings of twisted silk. Unlike its seemingly simple appearance, making a guqin is    2    (extreme) demanding. An outstanding piece can take anywhere from two to several decades    3    (create). It is a result of art and time.

The tone of a guqin is quiet, light and    4    (distance). Vibrations (琴弦振动) are used to produce a flowing and lingering (持续的) quality,    5    abundant empty notes in between. As the listener fills in the gaps in their own minds, a connection is formed between music and man.

The guqin     6    (favor) by the scholars in ancient China. The most well-known guqin musician was Yu Boya in the Spring and Autumn and Warring States periods. As he played his guqin in the mountains, a woodcutter named Zhong Ziqi heard the music and understood exactly    7    Yu wanted to express. This deep understanding formed     8    strong bond between them, and they became close friends. This is the famous tale behind the guqin masterpiece, Flowing Water, High Mountains. The piece has been passed down through     9    (generation) and is considered one of the most famous and important compositions in Chinese guqin music.

This graceful dialogue, flowing from brushed fingertips and    10    (travel) for thousands of years, is continuing to this day.

9 . IT’S A TYPICAL morning: you wake up, take a shower, brush your teeth, and then prick (刺; 扎) your arm with a tiny needle. Wait, what? Unless you have a serious disease such as diabetes, you probably haven’t ever tested your own blood. But in the future, that might change.

The company Cor already sells a system for home blood testing. You stick your arm using a supposedly painless, one-off , blood-drawing cartridge (针筒) about the size of a lipstick. Then you stick the cartridge into a device that looks like the base for an electric toothbrush. A few minutes later, an app on your phone buzzes with updated information, including your current health data and tips on what to eat and how to exercise during the day.

It’s true that blood contains a wealth of information about a person’s health. Blood tests can show if a person is infected with a disease or at risk for a variety of problems, including a heart attack or a stroke. But most people don’t test their own blood until a doctor says it’s time. Healthy young adults get regular blood tests about every five years. These tests happen at a lab, where a technician or a nurse sticks a long needle into the arm to draw out several tubes full of blood. Cor and similar companies, such as WellnessFX, are trying to change all that. They think people deserve access to more information about their own health.

But not everyone is convinced that regular blood testing for healthy people is a great idea. Cor’s system is expensive and may not offer much benefit. “The lightest result here is that you lose your money and then you’re reminded to get more sleep and to eat more fruits, vegetables, and fish,” Pieter Cohen of Harvard Medical School told the New York Times. “The worst result is that you end up getting frightened by probably abnormal results that are actually completely normal for you.”

Plus, the results of a home blood test might be wrong. It’s hard to get accurate results from a tiny amount of blood. So what do you think? Is monitoring your own health via pinpricks the way of the future? Or is it better to leave blood testing to medical professionals?

10 . The Union Jack is the national flag of the United Kingdom. It is so called because it combines the emblems (象征) of three countries—England, Scotland and Ireland (although since 1921 only Northern Ireland has been part of the United Kingdom).

The term “Union Jack” possibly dates from Queen Anne’s time, but its origin is uncertain. It may come from the “Jacket” of the English or Scottish soldiers; or from the name of James Ⅰ who originated the first union in 1603, in either its Latin or French form “Jacobus” or “Jacques”; or, as “jack” once meant small, the name may come from a royal proclamation (声明) issued by Charles Ⅱ that the flag should be flown only by ships of the Royal Navy as a jack, a small flag at the bowsprit (船首).

The Union Jack was originally a royal flag (when the present design was made official in 1801, it was ordered to be flown on all the King’s forts and castles, but not elsewhere); it is today flown above Buckingham Palace and Windsor Castle when the Queen is not in residence. On news of a royal death, the Union Jack will be flown at halfmast (下半旗).

The flying of the Union Jack on public buildings is decided by the Department for Culture, Media and Sport at the Queen’s command. The Union Jack is flown on government buildings on days marking the birthdays of members of the royal family, such as the Queen’s official birthday, and on the days of the State Opening and prorogation (休会) of Parliament; it is also flown on St David’s Day, St George’s Day, St Andrew’s Day, and St Patrick’s Day.

Although the Union Jack originated as a royal flag, it is now also flown by many people and organizations elsewhere in the United Kingdom. Its use as an emblem has extended beyond the form of a flag and the Union Jack is frequently shown on other objects.