The phrase "a main constraint" is correct and usable in written English.
It can be used when discussing a significant limitation or restriction in a particular context, such as project management or problem-solving.
Example: "The budget is a main constraint that we need to consider while planning the project."
Alternatives: "a primary limitation" or "a key restriction".
The development of reliable tools to inhibit fouling represents a main constraint holding membrane technologies away from a definitive maturation.
The mere fact that engineered T cells are personalized therapies rather than a mass product has been a main constraint for clinical outspread.
Our results reinforce the idea that a main constraint on the evolution of cofactor-dependent enzymes is the functional binding of the cofactor.
Among all the issues caused by the intermittency of wind power, voltage stability is a main constraint for the further development of low-carbon power system [10, 11].
Disease, especially infectious disease, is a main constraint of biologically efficient livestock production and both endemic and exotic disease results in mortality and morbidity and hence less food than should ideally be available in current farming systems.
Small aperture terminals have a wide field of view and consequently will transmit a significant amount of power toward adjacent satellites, causing the interference at these satellites to increase, which is a main constraint for the development of the satellite communications on-the-move system.
It had also worked on fitting a bomb on a missile warhead.So the main constraint on Iran going nuclear is the availability of fissile material.
The second challenge is to guarantee the performance or the quality of service (QoS) of the primary network, which is the main constraint in a CRN.
The main constraint for a more rapid expansion of E85 availability is that it requires dedicated storage tanks at filling stations, at an estimated cost of for each dedicated ethanol tank.
Their main constraint was a severe shortage of human resources.
"There is also a growing realization that the main constraint faced by children with disabilities is not the child's impairment, but widespread prejudice and discrimination – we should focus on what those children can achieve, rather than what they cannot do", he added.
