I usually only use layers to quickly turn off and on large group items to test out different scenarios or to temporarily turn off poly heavy objects such as trees while I model.

我通常只使用图层来快速打开和关闭大组件项目，以测试不同的场景或暂时关闭面多的项目，比如模型中的树木。

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As an example of large sized structural component, the mechanical model of load calibration test of an airplane wing was analysed.

以飞机机翼等大型结构为例，探讨了大型结构部件载荷标定试验的力学模型。

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Dynamic condensation methods for finite element models have been broadly applied in eigenvalue problems of large structures, test analysis model correlation and so on.

有限元模型的动力缩聚法已被广泛地应用到大阶系统的特征分析、试验-分析模型的相关分析等领域中。

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The pilot program will help test the efficacy of the Groupon model with large retailers, for whom multistore environments and easy integration with existing point-of-sale systems are big issues.

FORBES: Will Groupon Make Consumers More Fickle?