静刚度是机床性能的重要指标，有必要在设计阶段对其进行预估。
The static rigidity is an important index of machine tool's performance, which should be forecasted in the planning phase.
现阶段不宜练静功。
提出了黄土滑坡运动“静动阶段”和“运动阶段”的观点。
The creep stage and movement stage about loess landslide moving is established.
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