Sentence examples similar to formula has been maintained from inspiring English sources

Confidence has been maintained.

The balance has been maintained.

The formula has been discovered by Newton and Gregory.

The formula has been a success.

Infant formula has been contaminated and children have died.

The danger of this formula has been especially clear recently.

The formula has been successful from the start.

The formula has been winning over British shoppers.

So far the formula has been working.

The formula has been perfect.

Of course, 11 years later the formula has been refined.