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Mr. Alden kept the necklace in his pocket. Next morning, after the housework was done, the train began to slow down. It went clacking onto a siding and came to a stop. The Aldens went down the steps, and there was Al. Al called to them, You have two

VOA标准英语2014--新的太阳能电池减少生产中对环境的危害

New Solar Cell Minimizes Environmental Risks in Manufacturing Process 新的太阳能电池减少生产中对环境的危害 Scientists in England report the development of a new solar cell that minimizes environmental risks in the manufacturing proc

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In a short time the train stopped at Glass Factory Junction. The Aldens got off the train and looked around. They could not see any sign of a town. There was a small freight station on one side of the tracks and a large factory on the other. Everythi

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Enamel prisms - rod-like bundles of hydroxyapatie crystals which are orientated at right angles to the tooth surface. Each prism can be traced from the outside of the enamel all the way to the dentine

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Cemento-enamel junction- the junction between the enamel covering the crown of the tooth and the cementum covering its root. Often referred to as the CEJ. Cementoblasts - cells of mesenchyme origin, i

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Morphogenesis - the process in which tissue shapes and organ structures are developed during embryology. Morphogenic fieled - an environment in which the shape or pattern of a developing organ is dete

专业术语—口腔生理学术语N(英文详解)

Nerve growth factor- a cytokine that promotes the growth and repair of sensory nerves and maintenance of sympathetic nerves. Neural crest cells - cells derived from the ectoderm layer in the embryo. T

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By Steve Mort Fort Lauderdale, Florida 13 September 2007 Parts of the United States are facing a shortage of sand, and officials are working on innovative ways to fix the problem. In Florida, experts say beach erosion caused by a rising sea level and

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The most powerful source of energy on the planet is actually out in space. It's our sun. More energy falls as sunlight on the US in a single day than it uses in a year. But it's been difficult to turn that sunlight into electricity. Many of us alread

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This is the VOA Special English Development Report. Millions of people around the world cook their food over a smoky fire every day. It is often difficult to find wood for the fire. People who do not have wood must spend large amounts of money on co

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Large Windows Could Capture Solar Energy 利用大窗户吸收太阳能 Solar cells have been around since the 1950s. But now there is a race to develop transparent solar cell that can cover windows of buildings and still capture the suns light for e

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Sally was petting her cat. Her cat's name is Kitty. Kitty is a large black cat. Sally ran her finger down Kitty's back. She loved her cat. Her cat smelled like shampoo. She had been washed that morning. Cats do not like water. Kitty, on the other han

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PV solar technology is more complex. When sunlight hits a PV cell, electrons in the cell are knocked out of their orbits. Electric fields channel the electrons in a current used to generate electricity。 Unlike thermal solar panels, PV technology is

新西兰英语 431 Energy efficient house

If you live in Wellington, go to Frank Kitts Park on the waterfront to see the Kiwi bach called First Light. It will be there from today until May 24th. Four Victoria University architecture students designed this small house like a Kiwi bach for a c

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That doesn't necessarily follow. 这不能算作一个理由。 There are certain Fulton-style guns perfected by the Englishmen Philippe-Coles and Burley, the Frenchman Furcy, and the Italian Landi; they're equipped with a special system of airtight