文章列表
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1.精美英文欣赏:人口增长
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Population Growth The growth of population during the past few centuries is no proof that population will continue to grow straight upward toward infi...
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2.精美英文欣赏:陶器
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Pottery Ancient people made clay pottery because they needed it for their survival. They used the pots they made for cooking, storing food, and carryi...
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3.精美英文欣赏:饲养牡蛎
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Raising Oysters In the past oysters were raised in much the same way as dirt farmers raised tomatoes - by transplanting them. First, farmers selected ...
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4.精美英文欣赏:盐与新陈代谢
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Salt and Metabolism Just how salt became so crucial to our metabolism is a mystery; one appealing theory traces our dependence on it to the chemist ry...
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5.精美英文欣赏:上学与受教育
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Schooling and Education It is commonly believed in the United States that school is where people go to get an education.Nevertheless, it has been said...
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6.精美英文欣赏:科学理论
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Scientific Theories In science, a theory is a reasonable explanation of observed events that are related. A theory often involves an imaginary model t...
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7.精美英文欣赏:摩天大楼与环境
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Skyscrapers and Environment In the late 1960's,many people in North America turned their attention to environmental problems,and new steel-and-glass s...
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8.精美英文欣赏:睡眠
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Sleep Sleep is part of a person's daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an avera...
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9.精美英文欣赏:统计学
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Statistics There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to ke...
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10.精美英文欣赏:郊区的发展
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Suburbanization If by suburb is meant an urban margin that grows more rapidly than its already developed interior, the process of suburbanization bega...