About fifteen thousand years ago, the delta swelled and in time land was formed through alluviation.
15000年以前，古三角洲隆起，逐渐冲积成了陆地。
About two million years ago, the area was inundated by tides and submerged in epeiric seas. Out of this an ancient delta then gradually emerged.
200万年以前，海潮侵吞，形成浅海区，以后，逐渐形成古三角洲。
undersea delta
潜三角洲, 水下三角洲
Studies on sporo - pollen and paleoenvironment of Holocene in the East edge of Changjiang River Delta
长江三角洲东缘地区全新世孢粉与古环境研究
Diatoms and Their Palaeoenvironments from the Cores of Xijiang Delta in China;
西江三角洲岩芯中的硅藻及其记录的古环境
Study on the Circular Economy of Building Reed Wetland in Ancient Yellow River Delta Coastal Zone;
古代黄河三角洲海岸带建成芦苇湿地循环经济
The Introduction of Nitraria tangutorum in the Yellow River Delta Coastal Saline
唐古特白刺在黄河三角洲滨海盐碱地的引种
LATE PLEISTOCENE EVOLUTION OF THE PALEO YANGTZE DELTA IN THE SOUTH YELLOW SEA
晚更新世南黄海西部陆架的古长江三角洲
Many deltas are triangular in shape.
很多三角洲是三角形的。
The Quaternery Transgression and Paleoclimate-Monsoon Evolution of Eastern Changjiang Delta, China;
长江三角洲东部地区第四纪海侵地层、古气候古季风演化研究
Institutional System and the Development of the City Clusters of the Big Pearl River Delta--on Base of New Classical Economics;
珠江三角洲城市群发展的制度分析——从新兴古典经济学的角度分析
I know many of the early civilizations prospered on deltas.
我知道很多古老的文明都是在三角洲上蓬勃发展起来的。
Archaeology Information Management System Based on GIS --A Case Study of the Yangtze-Delta Region;
GIS支持的考古信息管理系统——以长江三角洲地区为例
EVOLUTION OF SEDIMENTARY FACIES AND PALEOENVIRONMENT DURING THE LATE QUATERNARY IN WANQINGSHA AREA OF THE PEARL RIVER DELTA
珠江三角洲万顷沙地区晚第四纪沉积相与古环境演变
The Holocene sporopollen characteristics and their paleoenvironmental significance of Core GZ-2 in Pearl River Delta
珠江三角洲GZ-2孔全新统孢粉特征及古环境意义
The Long-range Transport of Dust from Mongolia Gobi to the Yangtze River Basin and its Mixing with Pollutant Aerosols
亚洲沙尘由蒙古戈壁向长江三角洲的传输及其与污染气溶胶的混合特征
There are three deltaic types developed in lacustrine strata, i. e., normal, braid and fan deltas, which consist of delta plain, delta front and front delta.
在湖泊中存在三种三角洲类型，即正常三角洲，辫状三角洲和扇三角洲。
contemporaneous delta-submarine fan couples
同期三角洲-海底扇对