Energy use can be measured in different ways (relating to cost, energy, or carbon emissions) and, irrespective of the definition used, different views are taken on the relative importance of energy harvest and energy conservation to achieve a net energy balance. Although zero energy buildings remain uncommon in developed countries, they are gaining in importance and popularity. The zero-energy approach has potential to reduce carbon emissions, and reduce dependence on fossil fuels. Most ZEB definitions do not include the emissions generated in the construction of the building and the embodied energy of the structure. So much energy is used in the construction of a new building that this can dwarf the operational energy savings over its useful life.

　　A building approaching net zero-energy use may be called a near-zero energy building or ultra-low energy house. Buildings that produce a surplus of energy during a portion of the year may be known as energy-plus buildings.

　　If the building is located in an area that requires heating or cooling throughout parts of the year, it is easier to achieve net zero-energy consumption when the available living space is kept small.

　　描述一个你已经购买的物品

　　描写你的专业

　　描写一个酒店

　　描写一个家用电器(除了电脑外)

　　描写一种颜色

　　描述一个家庭(不是自己的家庭)

　　是关于一个地方能学到history的

　　你觉得吵得地方是哪

　　TV show 主持人

　　杨澜：She's dubbed China's answer to Oprah Winfrey. One of the country's most famous faces, Yan Lang has an estimated fortune of hundreds of millions of dollars. And has also just been voted China's most beautiful woman. In 2001, she acted as the country's so-called "image ambassador" for its Olympic bid -- and was instrumental in winning the Games for China in 2008.

　　Educated at Colombia University in the United States, she won an audition to host a prime-time show in Beijing at the age of 21, suddenly exposing her to audiences of up to 300 million people. She then set up her own media company, which oversees her programs and has interests in magazines and Web sites. This week she will be hosting the one-year Olympic Countdown Ceremony and currently presents the show "One on One," which sees her speaking to a variety of heavyweight guests. Her other main program is a music talent show which searches for anthems for the Games -- that's where I joined her.

　　Oprah Winfrey (born Orpah Gail Winfrey; January 29, 1954) is an American television host, actress, producer, and philanthropist, best known for her self-titled, multi-award winning talk show, which has become the highest-rated program of its kind in history. She has been ranked the richest African American of the 20th century，the greatest black philanthropist in American history, and was once the world's only black billionaire. She is also, according to some assessments, the most influential woman in the world.

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