求一篇关于科技的英语作文

[求一篇关于暑假趣事的英语作文]My grandmother's home in the countryside, it is a picturesque scenery, every summer vacation I have to stay a few days, also can take one's ease of play, really...+阅读

求一篇关于科技的英语作文

Science and technology have changed our life thoroughly throughout the history, especially in the last century. There is a prevailing understanding about science and technology among the general public that they are the same thing of two different names but they are acutally two things. Science is kind of series of theorrtical concepts and people can accept it or not, and it will not affect commom people's life to a large extent, but it's a different way when it comes to technology because technology has more pratical effect on people. People have to endure the results of the pactical applicance of technology whether they are good or not, such as the air pollution, and it all happens without people's acceptance, for it all depends on the local governments' or even the nations' decision. 人工翻译希望满意~

英语作文：科技

关于科技的英语作文： Science and technology have changed our life thoroughly throughout the history, especially in the last century. There is a prevailing understanding about science and technology among the general public that they are the same thing of two different names but they are acutally two things. Science is kind of series of theorrtical concepts and people can accept it or not, and it will not affect commom people's life to a large extent, but it's a different way when it comes to technology because technology has more pratical effect on people. People have to endure the results of the pactical applicance of technology whether they are good or not, such as the air pollution, and it all happens without people's acceptance, for it all depends on the local governments' or even the nations' decision. 关于科技的英语作文： The development of science and technology makes our life more comfortable and convenient. However, scientists have created many problems, which are not easy to be resolved, such as air pollution, the deterioration of environment and the scarcity of natural resources, to which we must some solutions. Modern science and technology render people many advantages. Modern telecommunication shortens the distance between people and makes communication much easier. Internet is widely used now not only for collection of abundant information but also for correspondence. Email, the most effective communication device now, is becoming very popular. Besides, telephone and mobile phone make contact more convenient than before. Modern transportation, such as airplanes and high-speed trains make our journey smooth and fast. With the help of modern transportation, people can go everywhere they prefer to. The journey to outer space and other planets is not a dream any more. Rockets and space shuttles can help us realize the dream of space travel. Modern medicine prolongs peoples life and relieves patients of sufferings from many diseases. Cancer and AIDS are fatal to peoples health. Thanks to the endeavors scientists have made, these diseases become treatable. However, the process of scientific development also arouses many sever problems to our human beings. Internet, though widely used in modern communication, is easy to be destroyed by computer virus. Outer space exploration has produced much waste in the space. A tiny metal, a screw, for example can destroy a flying man-made satellite. Industrialization is making natural resources become scarce. Confronted with these problems, scientists are seeking prompt and feasible solutions. The development of science and technology bring about both positive and negative effects to us. We must eliminate the positive effects to the least extent.

求一片关于科技的英语作文字数约80

The development of science and technology makes our life more comfortable and convenient. However, scientists have created many problems, which are not easy to be resolved, such as air pollution, the deterioration of environment and the scarcity of natural resources, to which we must some solutions. Modern science and technology render people many advantages. Modern telecommunication shortens the distance between people and makes communication much easier. Internet is widely used now not only for collection of abundant information but also for correspondence. Email, the most effective communication device now, is becoming very popular. Besides, telephone and mobile phone make contact more convenient than before. Modern transportation, such as airplanes and high-speed trains make our journey smooth and fast. With the help of modern transportation, people can go everywhere they prefer to. The journey to outer space and other planets is not a dream any more. Rockets and space shuttles can help us realize the dream of space travel. Modern medicine prolongs peoples life and relieves patients of sufferings from many diseases. Cancer and AIDS are fatal to peoples health. Thanks to the endeavors scientists have made, these diseases become treatable. However, the process of scientific development also arouses many sever problems to our human beings. Internet, though widely used in modern communication, is easy to be destroyed by computer virus. Outer space exploration has produced much waste in the space. A tiny metal, a screw, for example can destroy a flying man-made satellite. Industrialization is making natural resources become scarce. Confronted with these problems, scientists are seeking prompt and feasible solutions. The development of science and technology bring about both positive and negative effects to us. We must eliminate the positive effects to the least extent.可以自己删减在提供一篇翻译的：现代科技使生活更加便捷（Modern Technology Makes Life More Convenient） Modern technology makes life more convenient; tools are the milestores of the technology as well as human being' s progress. Men used to cut trees with hand saw. But now, by using electronic saw they can cut down a tree in only a few minutes. Another example is more vivid: You have something urgent which has to be informed to your friend whose house is two hour's ride away. You probably want to make a phone call. But no telephone is installed in your friend' s home. What could you do? Nowadays, with modern technology advanting, using internet is popular with us. Some years ago, people had to get what they wanted through looking into a lot of information; at last people could become tired and spent too much time. Now, if you use Internet, all becomes a piece of cake. Only by clucking, you will gain what you expect. We all hope that modern technology will reach a higher level, because modern technology makes life more convenient indeed. [参考译文] 现代科技使生活更加便捷现代科技使生活更加便捷；工具是科技进步和人类进步的里程碑。

人类过去用手锯锯树，但是现在，用电锯可在几分钟内锯倒一棵树。另外一个例子更加生动形象：如果你有急事通知你的朋友，而他家距你家有2小时的路程，你可能想打个电话。但是你的朋友家又没安电话，你该怎么办？如今，随着现代科技的进步，使用网络已很流行。若干年前，人们不得不查找大量资料来搜集需要的信息，最后人累得疲惫不堪，还浪费了大量时间。现在，如果使用网络，一切就都是小菜一碟了。只要轻敲键盘，就会有求必应。我们都期待着现代科技能达到一个更高的水平，因为现代科技确实使生活变得更便捷。

求科技英语范文

Microwave and our life This article is about the electromagnetic wave. For the cooking appliance, see Microwave oven. For other uses, see Microwaves (disambiguation).A telecommunications tower with a variety of dish antennas for microwave relay links onFrazier Peak, Ventura County,California.The atmospheric attenuation of microwaves in dry air with a precipitable water vapor level of 0.001 mm. The downward spikes in the graph correspond to frequencies at which microwaves are absorbed more strongly. The right half of this graph includes the lower ranges of infrared by some standards Microwaves are a form of electromagnetic radiation with wavelengths ranging from as long as one meter to as short as one millimeter, or equivalently, with frequencies between 300 MHz (0.3 GHz) and 300 GHz.[1][2] This broad definition includes both UHF and EHF (millimeter waves), and various sources use different boundaries. In all cases, microwave includes the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum, with RF engineering often restricting the range between 1 and 100 GHz (300 and 3 mm).The prefix ＂micro-＂ in ＂microwave＂ is not meant to suggest a wavelength in the micrometer range. It indicates that microwaves are ＂small＂ compared to waves used in typical radio broadcasting, in that they have shorter wavelengths. The boundaries between far infrared, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary and are used variously between different fields of study.Beginning at about 40 GHz, the atmosphere becomes less transparent to microwaves, due at lower frequencies toabsorption from water vapor and at higher frequencies from oxygen. A spectral band structure causes absorption peaks at specific frequencies (see graph at right). Above 100 GHz, the absorption of electromagnetic radiation by Earth's atmosphere is so great that it is in effect opaque, until the atmosphere becomes transparent again in the so-called infrared and optical window frequency ranges.The term microwave also has a more technical meaning in electromagnetics and circuit theory. Apparatus and techniques may be described qualitatively as ＂microwave＂ when the frequencies used are high enough that wavelengths of signals are roughly the same as the dimensions of the equipment, so that lumped-element circuit theory is inaccurate. As a consequence, practical microwave technique tends to move away from the discrete resistors, capacitors, and inductors used with lower-frequency radio waves. Instead,distributed circuit elements and transmission-line theory are more useful methods for design and analysis. Open-wire and coaxial transmission lines used at lower frequencies are replaced bywaveguides and stripline, and lumped-element tuned circuits are replaced by cavity resonators or resonant lines. In turn, at even higher frequencies, where the wavelength of the electromagnetic waves becomes small in comparison to the size of the structures used to process them, microwave techniques become inadequate, and the methods of optics are used.