The phrase "a long time required" is correct and usable in written English.
It can be used to indicate that a significant amount of time is necessary for a particular task or process.
Example: "The project is complex, and a long time is required to complete all the necessary steps."
Alternatives: "a considerable amount of time needed" or "an extended period necessary".
Living and working on a ship with about 100 people for such a long time requires good communication skills, tolerance, and cooperation.
A solution to the above problem might be sequential (to ask about one image at a time) and stop whenever 10 images are found; this algorithm is cost-optimal asking only as many questions as needed, but could take a long time (requiring many rounds of questioning)—the cost and latency depends on which images are picked.
Another critical parameter in real-life applications, the corresponding time of the proposed classification system, was very competitive compared to the relatively long time required by an expert to make a decision by examining a data curve.
This is particularly exacerbated when mechanical properties are a primary outcome, given the long time required for testing of individual samples.
Its patrician beginnings, she suggested, have proved harder to shed than the puffy-sleeved blouses and knitted skirts that for a long time were required golfing attire for women.
At low temperature, i.e. 4 °C, a long time was required for a complete DNA hybridisation reaction because the cold temperature slowed down the DNA hybridisation reaction rate.
But since a long time is required to overcome the relapse effect, we observe the intersection of the robustness curves and the consequent reversal of their robust dominance.
Our data support the last scenario because in species with large effective population sizes, a long time is required for alleles to go to fixation, even in the absence of gene flow (Hudson and Coyne 2002).
That is the only way to revive the dream, but it will take a long time and require great courage and sacrifice.
But refocusing 400 brands "on the good the product can do", she reckons, will take a long time and "require patient capital".
