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    The following are introductions to some programs that BBC I will show on TV.

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    In addition to seeing wonderful films, one of the joys of coming to the Quad Cinema is to hang out in the area. The Quad Cinema is located right in the heart of Greenwich Village, perhaps the most charming and interesting neighborhood in the city. Here are some attractions we recommend, all within a comfortable walk from the Quad Cinema:

Washington Square Park

    As one of the best－known of New York City's 1,900 public parks, it is a landmark in the Manhattan neighborhood of Greenwich Village, as well as a meeting place and center for cultural activity. Come on a Sunday when it's most lively and festive.

New York University

    It surrounds Washington Square. See the wonderful Bobst Library and visit the amazing bookstores.  NYU is now considered one of the most powerful universities in the world.

Judson Memorial Church

    Located in the south of Washington Square between Thompson Street and Sullivan Street, opposite Washington Square Park, this beautiful church was completed in 1892. The Judson Memorial Church is most famous for its vocal participation in social events.

Washington Mews

    It is a hidden, private street in New York City between Fifth Avenue and University Place, just north of Washington Square Park. It was first developed as a mews(马厩街) that serviced horses from homes in the area. Since the 1950s the former stables have served as housing,  offices and other facilities for New York University.

Jefferson Market Courthouse

    Built in 1833 as a market, it was later changed to a courthouse, and in the 1950s it was emptied and close to being destroyed. It was saved and turned into a library. Many consider it to be the most beautiful building in the village.

    Blind people usually possess one advantage over other people who can see. Their sense of hearing is far more acute. Bats, whose sight is poor, use a sound location system to help them avoid blocks in the dark. They send out pulses of sound waves, pitched at 50,000 cycles per second, far above the limits of the human ear, which can hear sounds up to frequencies of about 20,000 cycles per second. As the echoes bounce back off obstacles such as trees and walls, the bats are able to take proper action.

    The first steps to help blind people to see with sound are based on exactly the same principle. The sound is given off by an ultrasonic (超声的) torch, whose shape is different from a normal electric torch. It is double-barreled. It works in a similar way to a sonar (声呐) unit on a warship or submarine. The unit's transmitter sends out pulses of ultrasonic waves at the same frequency as the bat and the receiver picks up the returning echoes. Because these are still above the frequency at which the human ear can pick them up. The echoes are filtered (过滤) through circuits that turn them into “bleeps” which can be clearly heard before passing them into headphones.

    This means that a person holding the torch can point it ahead of him and scan the area for obstacles over a range of about 25 feet. If there are no return echoes coming through the headphones, then there is nothing in the way. If echoes do come back, then the closer the obstruction the faster the succession of bleeps and the deeper the pitch of each bleep. With practice, the torch could help a blind person to lead a more normal life.

    At present, the experimental ultrasonic torch requires a shoulder bag to carry the batteries, cables for the power supplies and earphones, as well as the torch itself. Fortunately, reducing the size of the electronic equipment is progressing and it should not be long before the whole set-up can be reproduced in a form small enough to fit into a pair of glasses. The wearer would face in the direction he wanted to check, and lift or lower his head just as a sighted person would.

    For many people who live in cities, parks are an important landscape. They provide a place for people to relax and play sports, as well as a shelter from the often severe environment of a city. What people often overlook is that parks also provide considerable environmental benefits.

    One benefit of parks is that plants absorb carbon dioxide and give off oxygen. According to one study, an acre of trees can absorb the same amount of carbon dioxide that a typical car emits in 11,000 miles of driving. Parks also make cities cooler. Scientists have long noted what is called the Urban Heat Island Effect: building materials such as metal and concrete (混凝土) absorb much more of the sun's heat and release it much more quickly than trees and grass. Because city landscapes contain so much of these building materials, cities are usually warmer than surrounding rural areas. Parks and other green spaces help to lessen the Urban Heat Island Effect.

    Unfortunately, many cities cannot easily create more parks. However, cities could benefit from many of the positive effects of parks by encouraging citizens to create another type of green space: rooftop gardens. While most people would not think of starting a garden on their roof, human beings have been planting gardens on rooftops for thousands of years. Some rooftop gardens are simple container gardens that anyone can create with the investment (投资) of a few hundred dollars and a few hours of work.

    Rooftop gardens provide many of the same benefits as other urban parks and garden spaces, but without taking up the much-needed land. In the summer, rooftop gardens prevent buildings from absorbing heat from the sun, which can significantly reduce cooling bills. In the winter, gardens help control the heat that materials like brick and concrete release so quickly, leading to savings on heating bills. Rooftop vegetables and herb gardens can also provide fresh food for city settlers, making their diets healthier. Rooftop gardens are not only something everyone can enjoy but also a smart environmental investment.

    A dog found swimming more than 220 kilometers off the coast of Thailand has been returned safely to land.

    Late last week, workers on an oil rig (钻井平台) noticed the animal, all alone, in the water. It began swimming toward the side of the rig. The dog was able to get itself onto a solid area.

    He appeared cold, tired and fearful. The workers lowered a rope and secured it around the dog. Then, they worked together to pull the animal up to safety.

    The crew that found the dog quickly gave their new friend a name: Boonrod. The name means something similar to one who survives in a disaster in the Thai language.

    One of those workers was Vitisak Payalaw. He has been providing updates on Boonrod on his Facebook page. He said it was lucky that the crew noticed the dog in the water. If there had been waves, he said, the animal would not have been seen.

    No one knows how Boonrod ended up all alone at sea, or how long he had been out there. But Vitisak and others have guessed the animal might have fallen off a fishing boat.

    On Monday, Boonrod arrived on dry land. A team of animal doctors was waiting for him in the southern Thai province of Songkhla. Workers at the Songkhla port also welcomed the dog with neck rubs and a special welcome necklace made of yellow flowers. Many people took pictures with Boonrod.

    Vitisak wrote on Facebook, Today (April 15), a ship transporting the dog arrived onshore at around 10.am. His overall condition has improved. He is getting stronger and can smile.

    The dog is now in the care of an animal doctor in Songkhla. The animal protection group Watchdog Thailand said he is in good condition and getting stronger. On Tuesday, the group published pictures of Boonrod getting washed—and getting plenty of love and attention.

    Vitisak says that if no one claims Boonrod as their pet, he will take him with him to his home in northeast Thailand.