Both the general spring coefficient matrix of flexible connector and the mass matrix of discrete element are off-diagonal.
推导出一般情形下柔性连接元的广义弹簧系数矩阵和刚体元的质量矩阵都是非对角的。
The horse starts out in a straight line and then it hops off on a diagonal.
马从一条直线出发，然后沿着对角线跳跃。
The horse starts out in a straight line and then it hops off on a diagonal.
马从一条直线出发，然后沿着对角线跳跃。
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