The backtracking mechanism is an important facility for programminginlogic.
回溯机制是逻辑程序设计的重要设施。
2
To make modifications to the output style and layout might be difficult and even problematic as it can require significant changes in the programminglogic to achieve.
修改输出样式和布局可能很困难,甚至难以解决,因为这可能需要对编程逻辑进行显著更改才能得以实现。
3
This reduces the total programming effort by reducing the amount of effort spent in writing database control logic, while ensuring the consistency and validity of the data.