A simple prediction model for regional ground water and soll water concentration, in which the immobile water is taken into account, is proposed based on water movement and solute transport.

根据水均衡和盐分运动的基本原理，考虑到在实际情况下不动水体的存在，提出了一种简单的区域水盐动态预测预报模型。

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Their natural beauty had been hijacked by an extraordinary concentration of ankle-deep plastic and paper garbage on the ground.

然而令人扫兴的是，大自然的鬼斧神工却在齐踝深的塑料垃圾和废纸中黯然失色。

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Through continuous automatical adjustion of the paragraphs fluid volume, ground sand concentration, proppant type and size and so on, the software finally designs fracturing process.

通过不断自动调整各段防砂液体积、地面加砂浓度、支撑剂类型和粒径等，设计出压裂施工程序。

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