没有实效的英文

without actual effect

• 没有:    not have; there is ...
• 实效:    actual effect; sub ...
• 有实效的:    practical

例句与用法

1. The solution of a problem of overcurrent in a line must last . short - lived solutions are not cost - effective
   干路上的过流问题的解决必须是持续性的。短时的解决方法是没有实效性的？