rings event

• 正则事件

rings event的用法和样例：

例句

1. When an event can occur in several alternative ways, the probability amplitude for the event is the sum of the probability amplitude for each way considered separately.
   当一个事件发生有几种不同的方式，则事件的机率幅度是由几个个别被认为是分开的路径的机率幅度的总和。