"a concrete demonstration" is a correct and usable phrase in written English.
It means a tangible or physical display or example that proves or illustrates something. Example: The scientist provided a concrete demonstration of her theory by conducting a successful experiment in the laboratory.
The example is intended to provide a concrete demonstration of the capabilities of the IBLTool.
A spokesman for Borbély's investigatory branch of the ethics committee said that the action against Blatter and Platini is a concrete demonstration of Borbély's independence.
"Firstly, they are a concrete demonstration that the construction cost advantage, which wind enjoyed over solar until a year or two ago, is gone.
"This joint venture is a concrete demonstration of our strategic commitment to work with China to fully develop this exciting medium," Gerald M. Levin, AOL's chief executive, said in Beijing.
It's easy to say in an interview that you pay attention to detail, but this is a concrete demonstration that you actually do, and it catches my attention every time.
The only way for Netanyahu to head off an escalating diplomatic crisis in the coming weeks and months, will be a concrete demonstration of his commitment to negotiations with – as a first step – a demand for a freeze on all settlement building.
Still, a few concrete demonstrations that you communicate effectively with nonscientific audiences and have good administrative and organizations skills will enhance your resume.
The aim of that programme is to give an extra push to concrete demonstration projects, to create more attractive environments for investment, as well as to provide incentives to the private sector for technology transfer.
There has been a lot of talk along these lines, but no concrete demonstration of what a convention would look like.
That is, the teaching of heredity, developmental biology, and evolution can be integrated in the context of biotechnology applications starting with the concrete demonstration and examination of factors of genetic variation within individuals of a species and even diversity between species.
The reversal was the most concrete demonstration yet that the wave of fiscal conservatives who catapulted Republicans into the House majority is reshaping the political and policy calculations being made by the party leadership.
