| 1. | Formation and evolvement of ancient lakes 古湖泊的形成与演变。 |
| 2. | Earlier images of gusev crater taken from the air seemed to scream with evidence of an ancient lake bed 早些时候在空中对古谢夫盆地拍摄的图像,就像是在对人们大声宣布那里是一个古代湖床。 |
| 3. | In addition to the ancient lake beds are regions carved with dense networks of channels , seemingly created by rainfall and surface runoff 除了古老湖床之外,某些地区表面还镂刻著致密的沟渠网络,似乎是降雨和表面迳流的杰作。 |
| 4. | Within my lifetime , the red planet has been transformed from a point in the night sky into a land of towering volcanoes , dried - up riverbeds , ancient lakes and windswept lava plains 在我有生之年,红色行星从夜空中的一点,摇身变成一个世界充满了高耸火山、乾枯河床、古老湖泊和饱受风袭的熔岩平原。 |
| 5. | More than 20 million years ago , the ancient lakes petered out and the area of stone forest evolved into the present shape of plateau basin gradually , and developed the newest stone forest ground form at the same time 2000多万年前,古湖逐渐消失,石林地区逐渐向现今的高原盆地演化,同时发育了最新一期的石林地貌。 |
| 6. | The lake shore sandy dike in the shrinking process of " hetao ancient lake " in the geologic period , which is suffered from the wind force function " rises right on the sandy land " , is the substantial basis of the formation of maowusu sandy land 摘要地质历史时期“河套古湖”退缩残留的湖滨沙堤受风力作用“就地起沙” ,是毛乌素沙地形成的物质基础。 |
| 7. | The scope of the studied area is defined , quaternary geomorphic and geologic condition is introduced , and the achievement of predecessors " studies on ancient lakes and environmental evolvement on the south coastal of laizhou bay is summed up 研究区概况。首先,确定了研究区的范围,阐述了研究区第四纪地貌与地质状况。其次,对前人在莱州湾南岸古湖泊和环境演变方面所做的工作进行了总结。 |
| 8. | A little research on ancient lakes on the south coastal plain of laizhou bay has been done , except briefly elaborating the development of ancient lakes in historical period from the perspective of historical geography , by looking up the historical document data 前人对分布于莱州湾南岸平原上的古湖泊研究较少,仅限于通过查阅历史文献资料,从历史地理角度概略地阐述了古湖泊在历史时期的演变过程。 |
| 9. | Formation and change of ancient lakes are the results from the interaction of atmosphere , hydrosphere , biosphere , lithosphere and the activities of human beings . so by the study on formation and change of ancient lakes , general picture of environmental evolvement in the studied area can be revealed 古湖泊的形成与演变是大气圈、水圈、岩石圈、生物圈以及人类活动综合作用的结果,因此通过研究古湖泊的形成与演变能够揭示该区环境演变的特征。 |
| 10. | At the same time , by gathering a lot of historic document data , the historical evolvement of ancient lakes such as judian lake ? ingshuibo lake , heizhongbo lake and biehua lake and the reasons of vanishment of lakes are discussed . by consulting the course of the evolvement of ancient lakes in hebei plain , the law of the evolvement of ancient lakes in the south coastal plain of laizhou bay is summed up 与此同时,本论文结合大量历史文献资料,从历史地理学的角度重点论述了巨淀湖?清水泊、黑冢泊和别画湖的历史演变过程以及古湖泊消亡的原因,并通过参考河北平原古湖泊的演化过程,总结出莱州湾南岸平原古湖泊的演化规律。 |