Meanings of remain efficient in English

No one who is deprived of a sufficiency of fresh air can long remain efficient.

Elan said in its email that its job cuts were part of an effort to remain efficient.

Renewable power sources like wind and solar are intermittent, meaning power grids will need to call on other sources to remain efficient and consistent.

Like people, the financial arrangements that facilitate property purchases will require regular attention if they are to thrive and remain efficient throughout their lifetime.

She took a spiteful pride in remaining efficient whatever the crisis, so had carried down a tray of cups.