The research shows that the elastoplastic BEM is satisfactory for analyzing flat rolling of plate and strip.

该研究表明，弹塑性边界单元法用来分析板带轧制是满意的。

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In the paper, the elastoplastic boundary element method (BEM) of the initial strain is worked at calculating parameters of flat rolling of plate and strip.

本文在计算板带轧制中的参数时应用了初始应力的弹塑性边界单元方法。

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The well-paved surfaces and rolling hills became flat, dusty, pot-holed roads, with mountains never closer than the horizon.

在起伏的山地上铺设良好的道路变成了平地上坑坑洼洼，尘土飞扬的道路，而山却总是远在地平线上。

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The flat, rolling countryside surrounding the capital is dotted with ranches where you can encounter cowboy culture and gallop into the sunset astride an Argentine thoroughbred.

BBC: Where have all the cowboys gone?

Resistance adjustments are instant, making it easy to replicate everything from a flat or rolling hill course, to the coast down a hill after a hard climb.

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For less-skilled riders, Ubin also has a network of rolling and flat gravel roads, and even the odd sealed stretch.

BBC: Singapore��s curious bicycle island