If mineral veins sometimes resemble botanical illustrations, blame it on Earth's molten nature and fluid mechanics: when seen from above, a branching river also looks like a tree.
矿脉其实有时会像植物图鉴，是因为地球的熔融性质和流体力学机制：当我们俯视的时候，就能看到像树枝一样的分支河流。
The mechanics of sediment-laden flow has been one of the most important subjects in hydraulics and river dynamics.
挟沙水流的运动规律是泥沙运动力学中最基本、最重要的研究课题之一。
The achievement of this paper has an important reference value in analyzing the mechanics of bedload movement in the mount river without field data.
本文的研究成果对分析没有实测资料的山区河流卵石推移质的运动规律具有重要的参考价值。
A portable torsional vane shear device has been developed to meet the needs of research work in marine geology, river exploration, geotechnics, oil drilling and soil mechanics.
鉴于海洋地质、内河勘察、地下工程、石油钻探以及土壤研究的需要，我们借鉴国外仪器的特点设计了袖珍十字板剪力仪。
A portable torsional vane shear device has been developed to meet the needs of research work in marine geology, river exploration, geotechnics, oil drilling and soil mechanics.
鉴于海洋地质、内河勘察、地下工程、石油钻探以及土壤研究的需要，我们借鉴国外仪器的特点设计了袖珍十字板剪力仪。
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