这种最优状态不但难寻其踪，而且对于来自外部的微小扰动极其敏感，因此它对于系统的演化往往无足轻重。
This optimum state is not only elusive, it is also hyper-fragile to small changes in the environment, and therefore often irrelevant to understanding what is going on.
其方法很简单, 只要对一个点或多个点进行磁化以发挥更大的功效, 然后在其附近放置一个微小的传感器就能检测到它们在电阻下的变化从而得知各点的状态.
Simply magnetise a spot or, more usefully, many spots, and the spots' status can be detected by measuring the changes they induce in the electrical resistance of a tiny sensor placed nearby.
这是Cfengine哲学中重要的一条法则：反复应用一些微小变化，直到系统收敛于一个稳定的预期状态为止。
This is an important statement of Cfengine's philosophy of applying small changes iteratively until the system converges to a stable, desired state.
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