When fields are declared protected, there is the possibility that methods in subclasses will directly access them, effectively increasing the coupling within a class hierarchy.
将字段声明为受保护时，子类中的方法就有可能直接访问它们，这样就可能有效地增加类层次结构中的耦合。
2
Each level of decomposition forces design decisions, providing ongoing synthesis, coupling of requirements and design specifications, and increasing system detail.
每个分解级别都强制进行设计决策，提供正在进行的合成，连接需求和设计规格说明，并增加系统详细内容。
3
The degree of polarization (DOP) in a single-mode fiber with random mode coupling has proved to be impossible to approach zero with increasing fiber length.