The phrase "actually when we use" is correct and usable in written English.
It can be used to introduce a clarification or explanation about a specific usage or context.
Example: "Actually, when we use this term, it implies a deeper meaning than what is commonly understood."
Alternatives: "specifically when we utilize" or "in fact, when we apply".
The purpose of this paper is to clarify what we actually need to express when we use risk information to support various decision scenarios.
Actually, we see this every day when we use any tool, from a pencil to a car.
PROFESSOR: And we'll be using that actually when we demonstrate amplitude modulation.
When the internet was new, when people didn't realize to what extent it would be important to people's lives, I gave talks pointing out that, actually, when people use the web what they do is really, really intimate.
However, when we actually use these features generated by CNNs layers in a practical environment, two challenges appear.
Find out what happens when we actually use them on unsuspecting New Yorkers in our video "Striking Out".
The flip side is there are also times when we actually use social media for social good, and to love and support others.
Actually, when using the GCR spectra based on the latest observation data by BESS, the best scale factor was 2.94.
Actually, when using the Wyden-Widmann method, it is observed that only a limited number of data points around the DTG peak should be employed or else the Ea obtained would not fit that obtained by the other kinetic methods.
Actually, when using peak matrices of spectra from only two species, complete pairwise separation by PCA as judged by non-overlapping 95% concentration ellipses (area defined by axes lengths of 2.4 times standard deviation) in the scatterplots was possible for most species (data not shown).
