The biggest issue with most of them is that no compiler warnings or run-time errors tell you that the transaction implementation is incorrect.
大多数陷阱最大的问题是，不会有任何编译器警告或运行时错误告诉您事务实现是不正确的。
2
Client classes can be coded to require only the abstract type, leaving the strategies and outcomes of implementation to the concrete class instances passed to them at runtime.
客户机类可被编码为只需要抽象类型，而把实现策略和结果留给在运行时传递给它们的具体类实例。
3
A service definition created in WSDL describes the format of system requests regardless of the run-timeimplementation.