The phrase "a very useful one" is correct and usable in written English.
It can be used to describe an object, tool, or concept that provides significant benefit or assistance.
Example: "This new software is a very useful one for managing our projects efficiently."
Alternatives: "extremely helpful" or "highly beneficial".
Unless two is a number, which it obviously is... but not a very useful one when they're up against six Porto players.
"Done in the right hands — and I stress that, because the whole psychedelic area attracts people who often think that they know the truth before doing the science — this could be a very useful one".
Dear Joss The distinction you draw between asking for forgiveness and seeking permission seems a very useful one – and reminds me of that all-too-familiar political rigmarole of the disgraced official's public "apology", where ostentatious contrition is somehow supposed to substitute for facing consequences or making amends.
Among various of Gronwall-Bellman-type inequalities, a very useful one is the following.
Okay, it's not a huge change, but it's a very useful one.
Other new features include a very useful one for office situations: customizable drop-off directions for drivers.
"I also had the occupational therapist and physiotherapists and they were both very useful," one participant noted.
While the first option may be very useful, one has to bear in mind the limitations that extrapolating parameter values from other systems and experimental conditions have [ 31].
Although TD models have proven very useful, one would not necessarily expect to find the formal structure of any current TD model implemented in the brain.
Amazon, for instance, only reveals that it now stores more than 200 billion digital "objects" and has to fulfil nearly 200,000 requests for them per second impressive numbers but not very useful ones (an object can be a small file or an entire movie).
