These floods have been very useful because they irrigate the Nile Delta and deposit a rich layer of topsoil used for growing crops.
这些洪水一直非常有用，因为它们灌溉着尼罗河三角洲，沉积下厚厚的一层表土，可以用来种庄稼。
Three-dimensional turbulent boundary layer on the ground board is measured through the ground effect tests of a delta wing with aspect ratio 3.
本文通过一个展弦比为3的三角形机翼的地面效应试验，测量了地板上的三元紊流附面层。
Main hydrocarbon bearing layer systems are Middle-Upper Jurassic shallow Marine sandstone, Upper Crataceous river faciess and delta faciess clastic rock.
主要的含油气层系为中上侏罗统浅海相砂岩和上白垩统河流、三角洲相碎屑岩。
The micro shear stress sensor which based on the smart skin for boundary-layer separation point detection of delta wing has been explored in this paper.
本文就以用于实现三角翼边界层分离点检测的面向灵巧蒙皮的微型剪应力传感器为对象展开研究。
The main layer is Putaohua Formation, deposited in the transition zone from a large delta front to lake in northern Songliao Basin.
主要含油层位是葡萄花油层，沉积时期处于松辽盆地北部大型三角洲沉积体系的前缘相带到湖相的过渡带上。
The main layer is Putaohua Formation, deposited in the transition zone from a large delta front to lake in northern Songliao Basin.
主要含油层位是葡萄花油层，沉积时期处于松辽盆地北部大型三角洲沉积体系的前缘相带到湖相的过渡带上。
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