As each callback must be finished as soon as possible, it is not possible to keep persistent state in function-local variables. 因为每次回调都必须尽快的结束,这使得它不可能在一个函数级别(function-local)的变量中保存持久的状态。
This paper discusses the stability of motion under persistent disturbance with respect to a part of the variables and establishes some conditions for judging the two different types of stability. 本文讨论受持续干扰的运动关于部分变元的稳定性问题,对两种不同类型的稳定性建立起若干判定条件。