The phrase "a class of powerful" is not correct in standard English usage.
It may be intended to describe a group of influential individuals or entities, but it lacks clarity and specificity.
Example: "In society, there exists a class of powerful individuals who shape policies and influence public opinion."
Alternatives: "a group of influential" or "a category of powerful".
The new amendment would phase down the emissions of HFCs, or hydrofluorocarbons, a class of powerful greenhouse gases.
N.D.M.-1 is of particular interest to microbiologists because it can make bacteria resistant to carbapenems, a class of powerful antibiotics.
Baycol was a statin, one of a class of powerful anti-cholesterol drugs that save thousands of lives by preventing heart attacks and strokes.
Noncoding RNAs (ncRNAs) represent a class of powerful regulators of cellular processes and are emerging as significant tools for strain engineering, particularly for complex phenotypes.
Levaquin is one of a class of powerful antibiotics called fluoroquinolones, which are associated with an increased risk of tendon injuries, particularly for people over 60 and people taking steroids.
Mr. Khodorkovsky, one of the Russian "oligarchs" -- a class of powerful, self-made businessmen who emerged in the mid-1990's -- apparently fell out of favor with President Vladimir V. Putin, who wants the oligarchs to steer clear of politics.
The defeat of Germany in 1945 brought with it the fall of a class of once powerful military commanders, government authorities and political henchmen who had formed the Nazi regime.
Therefore, a class of more powerful soft-decision decoding ECCs, low-density parity-check (LDPC) codes, [5 7], are introduced to improve the reliability of flash memories [3, 4, 8].
During a prolonged period of civil war in the 16th century, a class of politically powerful merchants had developed.
It has fewer anti-democratic overtones than "tsar" does, and captures the subordinate relationship of the official in question to the country's rulers better than naming him for a class of all-powerful hereditary kings.
During a drop-out, a certain class of powerful electromagnetic waves in the radiation belts can scatter ultra-relativistic electrons.
