The phrase "a certain time which" is correct and usable in written English.
It can be used when referring to a specific time period or moment that is being defined or elaborated upon.
Example: "There was a certain time which I remember fondly, filled with laughter and joy."
Alternatives: "a specific time that" or "a particular time when".
Of the Greek miracle, he commented that it could not be contested that something took place in a small corner of the world at a certain time, which first made philosophy possible and, throu that, certain forms of reflection and scientific knowledge: "Let us say that the Greek miracle occurre once, and that, like all unique phenomena, it can only be proved, not explained.
One of the major limitations of PSM is the assumption that the network will be idle for a certain time, which is both unrealistic and unfair.
It shows that there exists a certain time, which is approximately 5 times of the relaxation time, and the contribution of the composites' viscoelasticity could be ignored when the time is greater than the certain time.
First, consistent registration of the same malformation is not necessarily evidence of a correct diagnosis; however, it is a reflection of the diagnosis that the patient is considered to have at a certain time, which is the basic term in clinical practice, as well as in epidemiologic analyses of data from the NPR.
Designed primarily for students as users can schedule websites to block at certain times, which can be repeated on a weekly basis.
Many mouse strains now exist with Cre expression in only certain specific cell types or at certain times, which allows the effects of a particular floxed gene to be studied in each cell type separately.
"I was the leader until a certain time, after which someone else was, and after that…" (Interview I).
They showed that the power law distribution is only valid up to a certain time after which the distribution decays exponentially.
There is an important phenomenon that the average rating of users and items has shown a certain stability in a certain time period, which helps us predict the score become possibility.
Because of the variability in natural gas supplies and demands over time, a multi-period optimization approach is adopted over a certain time horizon, which includes Monte Carlo simulations to assess the associated volatility.
The prepared flat biological samples were covered with fragments of CR-39 polycarbonate α-track detector and were left tightly pressed for a certain time period, which varied between 87 and 1,130 h, depending on the 241Am concentration.
