The phrase "a certain unexpected" is not correct in standard written English.
It is not a commonly used expression and may confuse readers due to its awkward construction.
Example: "The meeting took a turn that was a certain unexpected surprise for everyone involved."
Alternatives: "an unexpected" or "a particular surprise".
All this said, what often makes publishing enchanting is a certain unexpected gloriousness.
The drop-in centre has a certain unexpected grandeur to it.
Audio-reactive animation and computer graphics have a certain unexpected beauty about them.
Simon spins vivid tales about love, growing older, faith and pilgrimage, each dripping with spiritual longing and a certain unexpected joy.
In his 1975 book "Here at The New Yorker," Brendan Gill observed that Mr. Angell was both "intensely competitive" and a master of "certain unexpected feats".
The curves for g12 s), however, are new and, to a certain extent, unexpected: the distances between isolated and regulatory genes do not show a peak at intermediate distances.
This substantial concordance was, to a certain extent, unexpected because Zhou and Stephens [ 15] showed that, in the presence of a marked sample structure, approximate methods tend to underestimate P-values (i.e. they are less significant) and involve a substantial loss of power.
As the media parsed the results, certain unexpected fault lines became visible.
The presence of certain unexpected peaks, however, had no apparent reason and might represent an irregularity in the manufacture of some devices.
Many argue that the human intuition plays a valuable role in risk assessment and that the black box nature of AI makes it difficult to understand certain unexpected outcomes or decisions produced by the technology.
But normally, network mobilization by individuals presents important characteristics (e.g. low income and education level) and regularities associated with social mechanisms, understood as regular patterns (e.g. land irregularity, lack of infrastructure, excessive density) that trigger or cause certain unexpected results such as disasters.
