the discrete of model的用法和樣例：
例句
- An overlapping Schwarz preconditioner and a multigrid preconditioner for the discrete system are developed and analyzed.
再經由元素的接合，得到系統的離散化代數方程式。 - Discretization of continuous attributes is always one of the key problems that need urgent solutions in rough sets theory.
連續屬性的離散化是粗糙集理論亟待解決的關鍵問題之一。
