The phrase "a difficult and critical" is correct and usable in written English.
It can be used to describe a situation, task, or decision that is both challenging and of great importance.
Example: "The team faced a difficult and critical decision regarding the project's future direction."
Alternatives: "a challenging and crucial" or "a tough and essential".
The accurate assessment of intravascular volume status for the therapy of severe hypovolemia and shock is difficult and critical to critically ill patients.
Human Resources Hiring a top-notch team is one of the most difficult and critical functions you perform for your business.
Knowing your audience is the most difficult and critical step, and is also something people do the least, Chadwell said.
These factors increase the complexity of the simulations and make the evaluation of the physical parameters more difficult and critical.
The determining of early strategic tasks thus becomes both difficult and critical while not many entrepreneurs believe in the value of their "homework" such as preparing a best available business plan (Davidsson 2006; Vuong and Napier 2015).
Ever the perfectionist, Howe, who died in 1976, was known for being very strict, difficult and critical with his crew.
Crisis is so often the catalyst for lasting change, and that is precisely why hanging on to our confidence during transitions is both difficult and critical.
Over time, the changing conditions during a pandemic will require a change in the public health response and recommended interventions, and the need for such changes will present a difficult but critical communications challenge.
Under President Obama, American officials worked to pressure China and other developing nations to provide more accurate data, viewing that as a difficult but critical part of establishing clear global benchmarks in climate change policy.
Understanding carbohydrate three-dimensional (3D) structure activity relationships (SARs) is a difficult but critical milestone in glycomics.
