paper and printing havebeen used for ages翻译

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• 英语翻译The use of mechanical dictionaries to overcome the barriers of language was first suggested in the 17th century.However,it was not until the 20th century that the first concrete proposals were made,in patents issued independently in 1933 by George Artsrouni,a French-Armenian,and by a Russian,Petr Smirnov- Troyanskii.Artsrouni designed a storage device on paper tape which could be used to find the equivalent of any word in another language; a proto
• 英语翻译Everybody knows waste paper and used coke cans are discarded everywhere.
• 英语翻译Abstract- In this paper,a new PWM contril scheme using a triangle waveform modulated by output voltage is presentde.Since the proposed control scheme only uses a comparator with hysteresis and a feedback resisor,numbers of components in a control circuit are reduced.In addition,because no error amplifier is used,the stability of the converter becomes excellent.The steady-state analysis of the proposed converter is performed and verified by the exp
• 英语翻译1In Japan,children who are three,five or seven years old are thought to be especially lucky.So,on November 15,families who have children of these ages take part in a very old festival.This special children's festival is called Shichi-Go-San,or "Seven-Five-Three".On this day,the children put on their finest clothes.And every child has a long paper bag.On each bag there are pictures with the meanings of youth(年轻) and long life.When everyone is ready
• "People used bamboo to make both oil-paper umbrellas and silk umbrellas." 这句话的中文.要求纯人工翻译.
• 人工翻译:People used bamboo to make both oil-paper umbrellas and silk umbrellas.要求全人工!
• 英语翻译Uniform crossover operator proposed by Syswerda [1]is used in this paper (fig.1).This method first generates arandom mask and then exchanges relative gene under themask between parents.A mask is simply a binary stringwith the same size chromosome“Uniform crossover operator ”,“random mask ”这两个应该怎么翻译啊?小弟先谢过~
• 英语翻译In the 13th century,the famous Italian traveler,Marco Polo,traveled a long way to China.During his stay in China,he saw many wonderful things.One of the things he discovered was that the Chinese used paper money.In western countries,people did not use paper money until the 15th century.However,people in China began to use paper money in the 7th century.A Chinese man called Cai Lun invented paper almost 2,000 years ago.He made it from wood.He took
• paper and printing havebeen used for ages翻译
• 英语翻译More and more offices are moving from black and white printing to colour,and from paper documents to electronic documents.
• 关于x的两个方程 x平方+4mx+4m平方+2m=0,x平方+(2m+1)x+m平方=0中至少有一个方程有实根,求m的取值范围
• Perhaps people have used it for a century