... constitutive property结构性质 constrained body约束物体 constrained distribution约束分布 ...
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用张量形式通过变分原理导出了无约束物体的动力学普适方程。
An universal dynamic equation for unrestrained body has been derived in the form of tensor by using variation method.
在力学中，经常遇到物体的约束运动。
In mechanics, usually meet with confined motion of the body.
装箱问题，即在一定的约束条件下如何将不同重量的物体放入不同的箱子，是一个历史悠久的有趣问题。
Bin packing, or the placement of objects of certain weights into different bins subject to certain constraints, is an historically interesting problem.
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