Sufficient and Necessary condition

• 充要条件

Sufficient and Necessary condition的用法和样例：

例句

1. The sufficient necessary conditions are given for a fuzzy controller to be a universal fuzzy approximator.
   给出由规则并算子构造的控制器是泛模糊逼近器的充要条件。
2. The author of this article finds a necessary and sufficient condition of the independece of random variables by using the three lemmas.
   利用三个引理，作者找到随机变量独立性的一个充要条件。