The phrase "a continuous challenge" is correct and usable in written English.
It can be used to describe a situation or task that consistently requires effort and attention over time.
Example: "Managing a large team can be a continuous challenge, as it involves balancing different personalities and work styles."
Alternatives: "an ongoing challenge" or "a persistent challenge".
Ensuring that ROS levels remain in the non-toxic range is a continuous challenge for cancer cells Indeed, cancer cells are continually exposed to high levels of ROS produced by compromised aerobic metabolism, chemotherapeutics, nutrient deprivation, and host immune responses [5], [6], [7].
Confusion and concern about basic safety issues for disabled drivers is a continuous challenge for the mobility industry, which is trying to promote quality standards after decades of improvisation.
Finding good teachers is a continuous challenge, she said, and she harbors plans for a junior-year-abroad program, so dance students from American colleges can come to her school and earn college credit.
He describes the need to re-train the local workforce and attract new sources of employment as "a continuous challenge" in an area with a long tradition of young people leaving school early and going straight into jobs of a type that used to be on their own doorsteps but aren't any more.
Getting to where it is didn't come easy, and staying there will remain a continuous challenge.
The emergence of surface mutants however is a continuous challenge to design more effective immunoassays.
The identification of the mechanisms underlying skin aging and the search for preventive or therapeutic strategies to slow down this process is a demanding and continuous challenge.
The colon is arguably the most immunologically active and stressed organ because of its continuous challenge from an environment rich in microbiota and its metabolites [49].
Providing an evidence-driven infrastructure is critical to addressing the continuous challenge of managing effective nurse-patient assignments in a workable staffing plan.
Prolonged AHR similar to what is observed during infection may also have been observed with a continuous toxin challenge.
Whilst the environment represents a continuous microbial challenge to the GTM, it is believed that external influences upon the microbial composition of the GTM are greatest in nascent microbiotas, following birth.
