指出了用于速度分析的三心定理的局限性，应用罗洪田定式应注意的一些问题。
The limitation of three link theorem in velocity analysis and the main problems in application of Lou s theorem are pointed out.
平垸行洪、退田还湖是鄱阳湖防洪保安的一项重要措施。
Pushing over the embankments and returning grain fields to the lake is an important measurement for the flood control of Poyang lake.
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