The phrase "a certain unusual" is not correct in standard written English.
It is typically used when referring to something that is specific yet uncommon, but the construction is awkward and unclear.
Example: "There was a certain unusual quality to the painting that captivated everyone."
Alternatives: "a particular odd" or "a specific strange".
Humphrey cares about whether he could have won the election, or whether he would have won if some things had been done differently, but it is hard to believe that he cares particularly whether according to a certain story people like him win in other worlds, or even whether according to a certain unusual story he himself wins in other worlds.
It takes a certain unusual aptitude to gain success and visibility in the field of relationship games.
It can happen, however, that in every possible explanation for a fact certain unusual events would have to be presupposed, and that in such a case the assumption of a miracle, of which we receive a report, is the least improbable and consequently the most probable explanation (RW II, 69).
Tad Friend visits the set of "This Is Where I Leave You," a home that had to fulfill certain unusual requirements.
Nevertheless, certain unusual swimming patterns and a few deformities were found among the experimental animals.
The constitutive release hypothesis, in addition to providing an explanation for the origins of a characteristic feature of hippocampus, provides some insight into the functional significance of certain unusual features of the dentate gyrus/mossy fiber system.
While The Tale of Mac Da Thó's Pig appears to be the quintessential Ulster Cycle story in theme and narrative, there are certain unusual elements of the extant forms which suggest it may have a more satiric quality, parodying the heroic genre of the Ulster Cycle.
Mr. Shawn explained that under certain unusual and special circumstances the word "which" could be employed at the head of a restrictive clause.
Were it not for certain unusual expenses, like the cost of integrating its two food businesses, Nabisco and Kraft, the company said its earnings would have been $1.24 a share, about a penny more than what Wall Street expected.
Excluding certain unusual items, the company said it would have earned $299 million, or 35 cents per share.
Nanocomposites are the emerging materials of the 21st century in view of their possessing design uniqueness without any compromises, certain unusual property combinations that are not found in conventional composites, as well as a wide spectrum of applications.
