考察了其粘均相对分子质量、质量分数、温度及流态对减阻效率、抗剪切稳定性的影响；
The effects of PLMA′s relative molecular mass, content, temperature and flow state on the drag reduction effectiveness and the shear stability were discussed.
本文作者认为作为相对性的稳定流理论仍然具有强大的生命力，特别是在评价、开发地下水资源的领域中还有广阔的应用前景。
The author thinks relative steady flow theory still has strong power of life and broad spectacle for valuing, developing and using groundwater resource. The paper cite a new word called critical flow.
本文的实验结果再次证实了双圆柱绕流的流态会在某些间距上出现突变，而在这些临界间距之间，流态则保持相对的稳定。
The jump between different flow patterns at certain critical position was discovered again in present experiment, and the flow patterns were relatively steady between the critical positions.
本文的实验结果再次证实了双圆柱绕流的流态会在某些间距上出现突变，而在这些临界间距之间，流态则保持相对的稳定。
The jump between different flow patterns at certain critical position was discovered again in present experiment, and the flow patterns were relatively steady between the critical positions.
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