英语翻译演讲时间不超过3分半中的

英语翻译
演讲时间不超过3分半中的

Loulan's disappearance:
Recently, LuoBuBo environment of scientific expedition team LuoBuBo drilling for the comprehensive system of environmental science. According to preliminary infer that sometime in the qinghai-tibet plateau, with seven to eight million years ago, the rapid uplift LuoBuBo bysouthing north migration, drying, resulting in increased gradually whole lakes dry. Such an explanation is not satisfactory, Chinese academy of sciences institute of geology and geophysics ZhouKun professor argues that, uncle LuoBuBo dry complex reasons. It is a global problem, and regional issues, besides natural causes, and human factors.
A global climate is dry, the big background
Human and neolithic in here, the Bronze Age here, then just value population prosperous period, the temperature LuoBuBo, environment. But then, after entering cooling zone, river water environment, lakes, desert expansion. At about 2000 BC, the performance of drought in north China area in loess accumulation, ice, lakes, retreat.
The disappearance of the ancient lou-lan and about in the fourth century to the han dynasty to the north (central), then it intensifies the dry periods. In fact, the dry process, not only is the ancient lou-lan and desert expansion, and successively occur in kelatongke pier, hananiah, milan, soil, and integration of khan city of wancheng etc.
Second, the qinghai-tibet plateau uplift is geography
Besides global climate change, the uplift of qinghai-tibet plateau is the most important cause of regional. In seven to eight million years ago, the rapid uplift of qinghai-tibet plateau. The uplift of northwest China's climate decisive role. LuoBuBo due to the geographical location is located in east Asia and the Pacific northwest inland, every year and the Indian Ocean warm air almost all rarely reach here.
When the global climate change, the east west began to appear the drought and desertification, gobi tendency. During this period, LuoBuBo started from the south to the north. 7 million years ago, when the lake near lake to the last drop dramatically. Because of the uneven terrain lake, the ancient great unity of LuoBuBo decomposing now, and manasseh kelatongke lake, north of lake and LuoBuBo larger.
In regional factors, there must be worthy of note, from the remote sensing data said recently, which had a big upstream of the landslide. The landslide whole blocked river channels, which was broken LuoBuBo of water. The question now is still don't know the exact time the landslide occurred in, whether it LuoBuBo dry before remains to study.
Third, LuoBuBo accelerate human development
Human activities on the LuoBuBo dry effect, more recent in late may. Waste water and trees are the key oasis can survive. Loulan city was established in kongquehe downstream of the water resources, there was a growing HuYangShu exuberant the materials for the building. When people in LuoBuBo edge loulan diameters for 10 million square meters of loulan city, they cut off many trees and reed, it will undoubtedly on environment.
In this period, human activities and the changes of water damage, make the war and the fragile worsening ecological environment. 5 the "river churchyard density, root stump" male who had felt loulan survival crisis, to pray tribe to bless his sons reproduction worship. But they cut the trees, already scarce has deteriorated to the local environment.
The final LuoBuBo dry, and in the tarim river upstream of the liberation of our development. When we in tarim river upstream of the tarim river after water diversion, bills, appear to flow downstream. This point in recent years from the Yellow River dry-up can get by. No water supplies because of LuoBuBo also began shrinking, eventually finally die.



（中文对照）楼兰的消失：
最近,中科院罗布泊环境钻探科学考察队对罗布泊进行了全面系统的环境科学考察.考察队认为：据初步推断,随着青藏高原在距今7到8万年前的快速隆升,罗布泊由南向北迁移,干旱化逐步加剧,最后导致整个湖泊干涸.这样的一个解释显然并不能让人满意,中国科学院地质与地球物理研究所的周昆叔教授则认为,罗布泊干涸的原因很复杂.这里面既是全球性的问题,也是地域性的问题,除了自然方面的原因,还有人为方面的因素.
一、全球气候旱化是大背景
新石器时代人类便涉足这里,青铜器时代这里人口繁盛,这时恰值高温期,罗布泊湖面广阔,环境适宜.但此后进入降温区后,水土环境变差,河水减少,湖泊缩减,沙漠扩大.在距今约2000年左右旱化加剧,这表现在中国北方广大地区冰进发生,黄土堆积,湖沼消亡,海退发生.
楼兰古城的消亡大约在公元前后至四世纪(中原的汉朝到北魏时期),这时正是旱化加剧的时期.其实,在这一旱化过程中,不仅是楼兰古城消亡,而且由于沙漠扩大,先后发生尼雅、喀拉墩、米兰城、尼壤城、可汗城、统万城等的消亡.
二、青藏高原隆起是地域因素
除了全球气候的变化之外,青藏高原的隆起是地域性中最重要的原因.在距今7到8万年前,青藏高原快速隆升.这种隆起对中国西北部的气候具有决定性的作用.由于罗布泊所处的地理位置位于东亚西北内陆,每年,太平洋和印度洋的暖湿气流几乎都很少到达这里.
当全球气候发生变化时,整个东亚西部都开始出现了干旱和沙漠化、戈壁化趋势.在这期间,罗布泊开始从南向北推移.在距今7万年左右的时候,湖面急剧下降到最后接近湖底.因湖底地形的高低不平,原先巨大统一的古罗布泊分解成现在的台特玛湖、喀拉和顺湖和北面较大的罗布泊.
在地域性因素中,还有一点必须值得注意,据说从近来的遥感资料判断,孔雀河上游曾发生了一次大的滑坡事件.这次滑坡整个堵塞了孔雀河的河流通道,致使罗布泊的来水被断.现在的问题是还不知道这次滑坡的具体时间,它是否发生在罗布泊干涸之前还有待于研究.
三、人类过度开发加速罗布泊消亡
人类活动对罗布泊干涸的影响,在晚近期可以说越来越大.水源和树木是荒原上绿洲能够存活的关键.楼兰古城正建立在当时水系发达的孔雀河下游三角洲,这里曾有长势繁茂的胡杨树供其取材建设.当年楼兰人在罗布泊边筑造了10多万平方米的楼兰古城,他们砍伐掉许多树木和芦苇,这无疑会对环境产生负作用.
在这期间,人类活动的加剧以及水系的变化和战争的破坏,使原本脆弱的生态环境进一步恶化.5号小河墓地上密植的“男根树桩”说明,楼兰人当时已感到部落生存危机,只好祈求生殖崇拜来保佑其子孙繁衍下去.但他们大量砍伐本已稀少的树木,使当地已经恶化的环境雪上加霜.
罗布泊的最终干涸,则与我们解放后在塔里木河上游的过度开发有关.当年我们在塔里木河上游大量引水后,致使塔里木河河水入不敷出,下游出现断流.这一点从近年来的黄河断流就可以得到印证.罗布泊也由于没有来水补给,便开始迅速萎缩,终至最后消亡.