The phrase "essential significance" is correct and can be used in written English.
It means the fundamental importance or crucial meaning of something. Example: The discovery of the cure for cancer holds great essential significance in the medical community.
The model proposed can provide reference to explore an essential significance in brain-inspired intelligence, and has significant value in military and civil affairs.
Buddhists generally agree that the thoughts held by a person at the moment of death are of essential significance.
By defining painting as "the sole imitator of all the manifest works of nature," Leonardo gave essential significance to the authority of the eye, believing firmly in the importance of saper vedere.
Reactive solute dispersion is of essential significance in various ecological and environmental applications.
Knowledge of the mechanical and creep properties for various plasma-sprayed coatings on machine elements is of essential significance in order to ensure their safe operation.
"Our interest list not in the particular rites but in their essential significance and they relative positions within ceremonial whole -- that is, their order......
More importantly, that there are no ad hoc sortals is essential to the significance of the formal proof that there is no such thing as relative identity.
Although the scribe drew attention to bladder and visual symptoms, and these are not known associations of essential tremor, their significance is speculative.
No essential differences in significances were observed when comparing Models 1 4 (Table 2).
An understanding of the sources of Renaissance majolica imagery is essential to appreciating the significance that majolica had for its contemporary audience, a task laudably fulfilled by the juxtaposition here of contemporary woodcuts, engravings, drawings, medals, placquettes and bronzes with the majolica pieces they inspired.
