discontinuity object的用法和樣例：
例句
- An element means that stress discontinuity from one element to the next are inevitable.
意味著一個單元與近旁單元的應力不連續是不可避免的。 - When light encounters an optical discontinuity, like an impurity in the glass or a micro-fracture, some of the light signal is reflected back in the opposite direction.
當光線遇到光學不連續，像在玻璃上的不純物或微小的裂縫，某些光線訊號會以相反方向反射回去。
