Electricity The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators. Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for million of years. Scientists are discovering more and more that the living world may hold many interesting secrets of electricity that could benefit humanity. All living cell send out tiny pulses of electricity. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends out brain waves of electricity, which can be recorded in an electroencephalogram. The electric currents generated by most living cells are extremely small often so small that sensitive instruments are needed to record them. But in some animals, certain muscle cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cell are linked together, the effects can be astonishing. The electric eel is an amazing storage battery. It can seed a jolt of as much as eight hundred volts of electricity through the water in which it live. As many as four-fifths of all the cells in the electric eels body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly to length of its body.
爱是一根线
心灵鸡汤:爱:能够创造奇迹的力量
双语散文:I like the subtle... 我喜欢这种淡淡的感觉
心灵鸡汤:感恩节上一颗被感动的心
趣味英语小故事:Shave Me First
双语散文:一种特别的思绪
双语散文:What is Love?
英语美文欣赏:Mother & Child 妈妈与孩子
英语美文欣赏:百万英镑(中文)
世界上最美丽英文26
趣味英语小故事:A Bad Foot
诗歌:记如果你忘了我
美文赏析:给生命定价
英语短篇小说欣赏-Heart
英语短篇美文欣赏:黄昏之美(带翻译)
双语散文:日本的新一代
英语美文欣赏:片刻的欢乐
英语名篇名段背诵精华46
英语晨读:历史上最
心灵鸡汤:成长的树根
英语美文欣赏:通往幸福的阶梯
英文短篇小说欣赏- 灌木丛中的王子
英语美文:美丽的春天
英语阅读:The Whale Sound
☆英语诗歌欣赏☆ 勿忘我-Forget Me Not
浪漫英文情书精选:My Wonderful & Loving Girl我可爱的女孩
双语散文:我会多采些雏菊花
爱的力量 the power of love
英语阅读:Today I Saw a Butterfly
双语美文:如果我今天死去
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