The effects of posture changes on the accuracy of robot have been studied when the robot is in non-singular posture, namely the determinant of inverse Jacobi matrix is not close to zero.

研究机器人处于非奇异位姿即逆雅可比矩阵行列式不接近零时，位姿变化对机器人精度的影响。

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For survival, it is useful to estimate the level of the risks they are supposed to manage at close to, but not quite, zero.

ECONOMIST: America, Europe and the management of danger: A hazardous comparison | The

Given that the venues are designed to provide as much capacity as possible for those events that are extremely popular, then it could be that a less popular event will not sell out even if prices are close to zero.

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It is not difficult to work out that, from the Fed's point of view, this brings them dangerously close to zero.

ECONOMIST: On the offensive