【正文】 schools ”for the school mission and on behavior, raising habits, pursuingdevelopment, hing research,benefit, the high quality。為了最有效地利用帶寬，系統(tǒng)設(shè)計(jì)的目的是通過(guò)基站的服務(wù)區(qū)到周邊小區(qū)，理論上是一個(gè)正六邊形。既使當(dāng)用 戶從一個(gè)國(guó)家移動(dòng)到另一個(gè)國(guó)家，電話也可以使用同一個(gè)個(gè)人號(hào)碼。商業(yè)服務(wù)在1991 年中期開(kāi)始了，截至1993 年有 36 個(gè)GSM 網(wǎng)絡(luò)在22 個(gè)國(guó)家誕生了。Support for international roaming 中國(guó)第一條高 鐵客運(yùn)專線——從北京到天津，它在 2008 年 8 月通車后一年就虧損了 7 個(gè)億。從中國(guó)目前的經(jīng)濟(jì)發(fā)展和人民的收入狀況來(lái)說(shuō)，我認(rèn)為中國(guó)高 economists believe that: the supply and capability of transportation infrastructure must advance appropriately, otherwise it will affect the sustainable, stable and healthy development of social means that we have to increase the investment into transportation infrastructure,But while government increase the investment into transportation infrastructure, it will to some extent decrease the practical measures to improve people39。綜 上所述，在中國(guó)大規(guī)模修建高鐵對(duì)中國(guó)經(jīng)濟(jì)的長(zhǎng)遠(yuǎn)發(fā)展來(lái)講是弊大于利，不利于擴(kuò)大內(nèi)需、不利于產(chǎn)業(yè)結(jié) 構(gòu)調(diào)整 結(jié)論：The highspeed railway will pete with the existing highway, railway, aircraft, shipping after it consummation which will lead to a situation new highspeed railway is mainly to carry passenger, so it will not speed up the turnover rate between cargos and the capital and will not decrease the costs of the whole social build such a large network of highspeed rail will need a large amount of money, the government must increase the taxes of people and enterprise to raise the this financial investment used in health care, social security, education, tec第三篇：英文翻譯Overview of the Global System for Mobile Communications 1 History of GSM During the early 1980s, analog cellular telephone systems were experiencing rapid growth in Europe, particularly in Scandinavia and the United Kingdom, but also in France and country developed its own system, which was inpatible with everyone else’s in equipment and was anundesirable situation, because not only was the mobile equipment limited to operation within national boundaries, which in a unified Europe were increasingly unimportant, but there was also a very limited market for each type of equipment, so economies of scale and the subsequent savings could not be Europeans realized this early on, and in 1982 the Conference of European s Posts and Telegraphs(CEPT)formed a study group called the Group Special Mobile(GSM)to study and develop a panEuropean public land mobile proposed system has to meet certain criteria: 這是一個(gè)不受歡迎的情況，因?yàn)椴粌H移動(dòng)通信設(shè)備被限制在國(guó) 界之內(nèi)，這在統(tǒng)一的歐洲是越來(lái)越不重要的，而且每種類型的設(shè)備都只有一個(gè)非 常有限的市場(chǎng)，因此經(jīng)濟(jì)尺度及隨后的儲(chǔ)蓄不可能體會(huì)。標(biāo)準(zhǔn)化保證了不同國(guó)家系統(tǒng)之間的兼容性，允許采取了數(shù)字化標(biāo)準(zhǔn)的國(guó)家的 訂戶使用他們自己的終端。這些將在下文中做更詳盡的解釋。這一技術(shù)把地區(qū)分成小區(qū)和區(qū)群，經(jīng)營(yíng)者可以利用有限的帶寬增加 覆蓋區(qū)域的面積。Dalian Science and Technology Advanced Unit。一組小區(qū)，作為一個(gè)整 體，給運(yùn)營(yíng)商提供整個(gè)無(wú)線電頻譜是指一個(gè)區(qū)群。這為操作員和訂戶帶來(lái)費(fèi)用成本的降低。1994 年初 期全球有1,300,000 用戶，截至1997 年10 月已突破55,000,000 用戶。Spectral efficiency The fast building speed will violate the rule of economic development, and at same time it faced many problems, such as loan repayment, staff highspeed railway of Chinafrom Beijing to Tianjin, it was launched in August 2008, after one year it lossed 70 total investment ofWuhanGuangzhou highspeed rail was about 110 billions yuan, now it is able to drive at least 120 pairs of cars, but in fact only 33 to drive, and lots of seats are empty, this is a serious waste of highspeed railway not only requires large construction investment, but also, it is impossible to recovery the shortterm cost based on its actural : The building of the high speed rail can drive the development of the industry example, the building need many workers and the new technology, so it expand the employment and promiot the technological another word through the building, more steel pro