She is very efficient at managing her time.
She is an efficient manager who gets things done quickly.
Efficient farming methods improve yields.
Is this energy efficient?
We are skilled at managing time efficiently.
She slowly figured out how to study efficiently.
My car is very efficient, so it's good for long trips.
My car is very fuel-efficient, so it's good for long trips.
I firmly believe that clear expectations are the foundation of efficient work performance.