And demonstrates the relations between the right (left) limit of function and right (left) derivative.
并讨论说明了导函数的右(左)极限与右(左)导数之间的关系。
The launch of a software control limit function, for launch time is too long to avoid damage to machine.
本机具有软件控制发射限时功能，避免连续发射时间过长损坏机子。
Use the limit definition of the function;
使用函数极限的定义；
Use the limit definition of the function;
使用函数极限的定义；
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