wasted effort造句怎么写

Hitherto, and it has not been wasted effort, people have played on words and pretended to believe that refusing to grant a meaning to life necessarily leads to declaring that it is not worth living.

He argues that having turbines blowing aimlessly in the wind isn't necessarily wasted effort - if your intent is to build an industry.

I felt chagrined at the wasted effort.

Patterns and principles are useful because they help us avoid wasted effort of continually examining first assumptions and reinventing the wheel.