My mother is a kind and gentle woman. She is very busy from morning till night. As a teacher she works diligently and efficiently. As Mother, she takes good care of us and gives us every comfort. I ha
Marine Mammals Since there is such an abundance of food in the sea,it is understandable that some of the efficient, highly adaptable, warm-blooded mammals that evolved on land should have returned to
新东方优美背诵短文50篇 Unit48:Bacteria 48 Bacteria Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters, bacterial size is measured in microns. One micron is a tho
Vision Human vision like that of other primates has evolved in an arboreal environment.In the dense complex world of a tropical forest, it is more important to see well than to develop an acute sense
新东方优美背诵短文50篇 Unit45:The Source of Energe 45.The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun’s very ce
Piano The ancestry of the piano can be traced to the early keyboard instruments of the fifteenth and sixteenth centuries -- the spinet, the dulcimer, and the virginal. In the seventeenth century the o
Plants in the Deserts Some cacti, like the saguaro, grow to tree size, but true trees need more moisture than most desert environments can supply, so they are scarce on deserts. Close to streambeds, c
Mirror, Mirror---What do I See? A loving person lives in a loving world. A hostile person lives in a hostile world. Everyone you meet is your mirror. Mirrors have a very particular function. They refl
The Organic Foods Are organically grown foods the best food choices? The advantages claimed for such foods over conventionally grown and marketed food products are now being debated. Advocates of orga
Facing the Enemies Within We are not born with courage, but neither are we born with fear. Maybe some of our fears are brought on by your own experiences, by what someone has told you, by what you’ve
Obtaining Fresh Water from Icebergs The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to ca
First Inaugural Address We observe today not a victory of party, but a celebration of freedom, symbolizing an end, as well as a beginning; signifying renewal, as well as change. For I have sworn befor
Colds and Age A critical factor that plays a part in susceptibility to colds is age. A study done by the University of ichigan School of Public Health revealed particulars that seem to hold true for t
The Happy door Happiness is like a pebble dropped into a pool to set in motion an ever-widening circle of ripples. As Stevenson has said, being happy is a duty. There is no exact definition of the wor
新东方优美背诵短文50篇 Unit39:The Salinity of Ocean Waters 39 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
Animals' Compasses Researchers have found that migrating animals use a variety of inner compasses to help them navigate. Some steer by the position of the Sun. Others navigate by the stars. Some use t
Raising Oysters In the past oysters were raised in much the same way as dirt farmers raised tomatoes - by transplanting them. First, farmers selected the oyster bed, cleared the bottom of old shells a
Please let me have a little world,please my dear husband.Be so generous as to Let me have a little of my own.If you find me scrawling on a piece of newspaper.please don't piple over my shoulders.It ma
Human Life a Poem I think that, from a biological standpoint, human life almost reads like a poem. It has its own rhythm and beat, its internal cycles of growth and decay. It begins with innocent chil
