以下为句子列表：
英文: A new extrapolation multigrid method in solving large scale finite elemen system of equation is proposed, i. e. new extrapolation values of finite element solutions on the first two level grids are used to provide the good initial values on the third leve
中文: 摘要提出一种求解大规模有限元方程组的新外推多网格法，即用前两层网格上有限元的新外推值提供第3层细网格上的好初值，然后用几次CG-迭代能得到较准确的有限元解。
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英文: The primary results showed that the hybrid grid method and corresponding mathematical model are especially suitable for simulating complicated flows in forebay of pumping station, in which bottom sill, diversion wall and underwater piers were installed.
中文: 可以较好地模拟出局部区域复杂的水流流态，生成网络的计算工作量小，能非常方便地进行不同整流方案的计算比较，实用性强。
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