The phrase "actual expression of" is correct and usable in written English.
It can be used when discussing the true or genuine representation of something, often in contexts related to feelings, thoughts, or artistic works.
Example: "The poem is an actual expression of the author's innermost feelings and experiences."
Alternatives: "true representation of" or "genuine manifestation of".
And yet when it comes to the actual expression of their players' voices the two sports are worlds apart.
And: Is this warning an actual expression of concern, or a way of letting foreign embassies take on the role of amping up Kim's threats now that his own propaganda machine is getting diminishing returns?
As a result, genomic analysis alone is insufficient as it is removed from the actual expression of proteins (Gregorich and Ge, 2014).
Many of these proteins were described as 'conserved hypothetical protein' or 'hypothetical protein'; and so, the actual expression of these gene products was confirmed.
While the diffusion-only model provides one with functions for quantifying the molecular information available within a space at some distance away from the transmitter, it does not avail us with the actual expression of the molecular information coupled into the receiver with respect to the molecular antenna used.
These processes, taking place between the moment when an uncertainty between behavioral options is recognized and the actual expression of behavior, we regard as 'taking a decision.' Such decision making needs to integrate (1) sensory input, (2) the current status reflecting evolutionary and individual history, (3) the available behavioral options, and (4) their expected outcomes.
Moreover, he argues that we can avoid making our (logical) categories unduly dependent on what language we actually have by treating objects and properties as correlates of possible, not merely actual, expressions of the relevant sorts (2010, 411).
Your photograph of the actress Ilana Rogel emoting looks like the actual expressions of a real human being.
To address this issue, new expressions for calculating the effective width of internal compressed elements (webs) and outstand elements (flanges) are proposed, which have been derived from the actual expressions of the Part 1.5 of the Eurocode 3 and validated against numerical results.
It can be glossed as a distinction between blameworthiness and actual expressions of blame; between backward- and forward-looking responsibility (i.e., responsibility for things one has done in the past versus responsibility for doing certain things in the future); and between responsibility as a form of judgment versus responsibility as a form of sanction.
