Sentence examples for improvements has been from inspiring English sources

Although DSSC efficiencies have been improving, the pace of these improvements has been somewhat slow, with an increase of only (thicksim 6%) [3] from a value of 7.1% in 1991 [4].

The arc of safety improvements has been dramatic.

Research on potential crop improvements has been delayed or abandoned.

Behind these improvements has been a shrewd Paxson.

More than 75percentt of the space in need of improvements has been retrofitted or replaced.

In practice, the impact of these improvements has been patchy, however.

Improvements have been made.

Of course, improvements have been made.

Various improvements have been made since then.

What improvements have been made?

But improvements have been made.