American Black Bears American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these bears have shiny black fur, but in the west they grow brow
The Alaska Pipeline The Alaska pipeline starts at the frozen edge of the Arctic ocean. It stretches southward across the largest and northernmost state in the United States,ending at a remote ice free
Botany Botany, the study of plants, occupies a peculiar position in the history of human knowledge.For many thousands of years it was the one field of awareness about which humans had anything more th
James Watt And The Teakettle A little Scotch boy was sitting in his grandmother's kit- chen. He was watching the red flames in the wide open fire- place and quietly wondering about the causes of thing
Love of Life Two men walked slowly, one after the other, through the low water of a river. It ran cold over their feet. They had blanket packs on their backs; guns, but no bullets; matches, but no foo
The Historical Significance of American Revolution The ways of history are so intricate and the motivations of human actions so complex that it is always hazardous to attempt to represent events cover
新东方优美背诵短文50篇 Unit37:Icebergs 37 Icebergs Icebergs are among nature’s most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being ---
Abundance is a Life Style Abundance is a life style, a way of living your life. It isn’t something you buy now and then or pull down from the cupboard, dust off and use once or twice, and then return
新东方优美背诵短文50篇 Unit38:Topaz 38 Topaz Topaz is a hard, transparent mineral. It is a compound of aluminum, silica, and fluorine. Gem topaz is valuable. Jewelers call this variety of the stone “precious to
British Columbia British Columbia is the third largest Canadian province, both in area and population. It is nearly 1.5 times as large as Texas, and extends 800 miles (1,280km) north from the United S
Icebergs Icebergs are among nature's most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being -- somewhere -- in faraway, frigid
Diane Ackerman / 迪安.阿克曼 The word “discovery” literally means, uncovering something that’s hidden from view. But what really happens is a change in the viewer. The familiar offers comfort few can resis
Growth That Starts From Thinking It seems to me a very difficult thing to put into words the beliefs we hold and what they make you do in your life. I think I was fortunate because I grew up in a fami
A Wet Sunday In A Country Inn A wet Sunday in a country inn ! Whoever has had the luck to experience one(1) can alone judge of(2) my situation. The rain pattered against the casements; the bells tolle
新东方优美背诵短文50篇 Unit36:Plate Tectonics and Sea-floor Spreading 36.Plate Tectonics and Sea-floor Spreading The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid o
Cells and Temperature Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are mo
I grew up in a small town where the elementary school was a ten-minute walk from my house and in an age when children could go home for lunch. At the time, I did not consider this a luxury, although
Relish the Moment Tucked away in our subconsciousness is an idyllic vision. We see ourselves on a long trip that spans the moment. We are traveling by train. Out the windows, we drink in the passing s
The Salinity of Ocean Waters If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are thre