The phrase "a certain position and" is correct and usable in written English.
It can be used when referring to a specific role or status in a context that may require further elaboration.
Example: "In order to succeed in this project, we need to establish a certain position and ensure that everyone understands their responsibilities."
Alternatives: "a specific role and" or "a particular status and".
Mr El-Erian sees himself as "a player-coach, playing a certain position and coaching others".
The boys had to lie in a certain position, and at midnight they were woken.
Position neurons respond strongly to a spot located in a certain position and poorly to stimulation of a larger area; others respond only to simultaneous binocular stimulation.
Based on the neighborhood of units in the array, we construct a graph whose node represents a short line segment with a certain position and slope.
Because someone is advocating a certain position, and it goes against government policy, it doesn't mean the government should start focussing on them and try to find something they can hurt them with.
Added Arad: We [plan to] put him in a certain position and concentrate on the human, not on the creature, which I thought was a really good beginning in 3".
A term is equal to 1 when a certain amino acid or interaction at a certain position exists, and 0 when it is absent.
"Now we can track how many times a certain position is jumping and if they're jumping more, they will shut us down and we'll do other things like pass or serve, so we don't physically exhaust ourselves.
When the coverage (i.e. the number of fragments that cover a certain position) is low and the error rate is relatively high, it is not infrequent the case in which, building a haplotype, exactly half of the fragments in a certain position have a certain value and half of them have another value.
Our studies show us over time that at a certain speed, it's virtually impossible to play at a certain position in the National Football League and play well".
It may be the case, however, that in a certain position at which C and D both have amino acid g while E has h, the ancestral amino acid was g.
