Generalized DAlembert-Lagranges principle for non-holonomic mechanics, including its Newtons formulation and Lagrangian formulation, are given. This principle can lead to the closed motion equations.

提出非完整力学的广义达朗贝尔-拉格朗日原理，包括其牛顿表述和拉格朗日表述。此原理能导出态空间封闭的运动方程组。

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While Dalembert may be a solid defender and adequate rebounder, he is not good for much else.

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Anything above the mid-level is too high a price for Dalembert, but in this league and especially in this market, he is certain to command much more than that.

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Is Dalembert a competent center?

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