The phrase "a certain position when" is correct and usable in written English.
It can be used to describe a specific state or condition that occurs at a particular time or under certain circumstances.
Example: "The team found themselves in a certain position when the unexpected changes in the market occurred."
Alternatives: "a specific situation when" or "a particular state when".
Different species can have copies of the same proteins; but a copy from one species might have different amino acids at certain positions when compared to a related copy from another species.
It's just that when it flexes in certain positions when I swing a club, the tendon pops out".
Why give that up? "In certain positions, when all the furniture is open, the space may resemble a loft, but once the furniture is removed, you get a different kind of space," Rodríguez Cedillo said.
"I began to realize how moist I would become in certain positions when my partner was deep.
"When I'm in the process of taking photos, the girls are usually moving except in certain positions when I am looking for something very specific," he says.
A term is equal to 1 when a certain amino acid or interaction at a certain position exists, and 0 when it is absent.
4) The influence of the number of nucleotides that should be counted before any influence of a nucleotide at a certain position can be assessed: when only two promoters have a certain nucleotide at a certain position and both of them are in the same class, that nucleotide/position combination will appear to have a strong influence on the promoter strength.
Letting the clinicians themselves validate the video data, is a most reliable way of validating, e.g. the camera position in a clinical setting, because when a certain position is selected, others, which might also have an important meaning regarding the study objective, are left out.
You should write down things like recurring weakness or pain in a specific parts of the body, difficulty breathing when in a certain position, sudden changes in perception, and other things that you do not normally experience or those that are "not right" in your opinion.
Most actors, when they reach a certain position of eminence, think they've got to do Lear.
