The phrase "altered and improved" is correct and usable in written English.
It can be used when describing something that has been changed for the better or enhanced in some way.
Example: "The software has been altered and improved to enhance user experience and performance."
Alternatives: "modified and enhanced" or "revised and upgraded".
As a result it is unusually susceptible, on a local level, to being altered and improved by the actions of a few good men or women.
Ms. Marcovicci's new show, "Marcovicci Sings Movies II," at the Oak Room, is an extensively altered and improved revival of one she performed there 21 years ago.
But rarely has the nature of a butter pat been so altered and improved upon as it has at the new Fatty 'Cue in Greenwich Village, the latest and best of Zakary Pelaccio's small group of Fatty restaurants.
It's too early to give up on the game — one of the benefits of a big virtual world like this is that it can be altered and improved over time.
Nevertheless, to fully develop the potential of SELPs, new polymer designs with altered and improved properties are required, allowing for a better understanding of the design of these but also leading to an expanded range of novel polymers with potentially enhanced applicability.
Innocence R uses altered and improved features and elements from the original, including character displays, the "awakened" character state, and the skit, title, grade and cooking systems.
The people of the world have recognized that technology can alter and improve their lives.
The devices will alter and improve the way we interact with and customize our homes, until we won't be able to remember a time before we weren't able to 3D print a new bathroom tub.
I argue that community efforts to transform vacant lots into productive gardens and food forests constitute a specific form of claims on the right to the city, and on the right to alter and improve urban ecology.
As we continue to refine our designs and the framework, we aim to identify opportunities to work directly with educators and students to design, develop, implement, and test a system that functions, from a holistic/systemic point of view, to support, alter, and improve spatial cognition in high-priority populations.
