nieefektywny Englisch:

Existing methods of production are expensive and inefficient.

Local government was inefficient.

The restaurant staff were inefficient.

I don’t like our new work schedule. It’s an inefficient use of time.

We have the most inefficient health care system in the world.

The program's memory management was so inefficient that it actually damaged the RAM somehow!

A literal boatload of new computers were recalled for inefficient power use.

This design is too inefficient to prototype.