The phrase "already been improved" is correct and usable in written English.
It can be used to indicate that something has undergone enhancements or modifications prior to the current moment.
Example: "The software has already been improved to address the bugs reported by users."
Alternatives: "has been enhanced" or "has been upgraded."
American officials say there have already been improved exchanges of intelligence, but the Mexicans consider it one-sided.
The iPod has already been improved several times, Jobs said, and will keep improving in ways that keep it ahead of the pack.
Speaking to the Guardian, Willetts said the regulatory regime had already been improved: "The evidence you have in some specific cases appears to show unacceptable behaviour … "Students and taxpayers are right to expect a quality education service.
Liberal Democrat ministers believe the party has misunderstood the proposals, which are currently being scrutinised in the Lords, and claim the bill has already been improved by Clegg since the measures were first issued for consultation.
At Papworth Hospital, room-cleaning protocols have already been improved, and the ventilation system in a new CF center has been redesigned to completely change the air once every 4 minutes.
And some website issues have already been improved, she said, noting that 90% of visitors can now create accounts and online transactions are occurring more efficiently.
However, depending on the reaction network to be modelled, the approximation can already be improved considerably by using piecewise delay distributions with only very few steps.
Local control in this disease could already be improved high-precision radiotherapy techniques such as stereotactic radiotherapy and/or intensity-modulated radiation therapy (IMRT), dose escalation, and high-LET RT.
But he pointed out that she already was improving her lot with conservatives by signing a number of bills to expand gun rights, restrict abortion, support school choice and bar ethnic studies programs in schools.
While shipping delays may already be improving, the market share data for the first weekend may not be the best way to measure the iPhone X's adoption, but it's what's available for now.
