The phrase "a very substantial one" is correct and usable in written English.
It can be used to emphasize the significance or importance of something in a discussion or argument.
Example: "The financial investment we made last year was a very substantial one, leading to significant growth in our company."
Alternatives: "a considerable one" or "a significant one."
The possibility that a rise in the minimum wage, even a very substantial one, would create unemployment or compromise the health of the city's small businesses was not necessarily irrelevant.
While the distinction between stillbirth and death immediately after birth might 'not seem to be a very substantial one', the crucial issue for him was not whether a child had been born alive or dead, but the fact that it had been born at all.
A midcycle refresh, but a very substantial one, outside and in, of the Mercedes E-Class line.
Leftist politics form a thread in his recollections, but not a very substantial one, and his political stands seem more notional than deeply felt.
"Among British Muslims, a minority – but a very substantial one – is sympathetic to a death cult which is among the most evil in history.
"And I think when you take all of the non-Romney votes, it's very likely that at the convention there will be a non-Romney majority — and maybe a very substantial one — and my job is to convert that into a pro-Gingrich majority".
Thus, the theoretical challenge is the very substantial one of linking the microscopic level to higher levels of description, transferring the physicochemical representation from the lowest level of concern to the highest, so that predictions of the materials properties faithfully reflect the underlying chemical characteristics.
But the single disc edition costs only $15.99 on sale, which is a very substantial difference.
But in using it as a one-upping mechanism, we're failing to connect in a very substantial way.
