"the substantial variation" is a correct and usable part of a sentence in written English.
It is typically used to indicate a significant or considerable difference or change from something else. Example: The new marketing strategy resulted in a substantial variation in sales, with a 50% increase in revenue compared to last quarter.
Our results confirm prior findings with respect to the substantial variation in disclosure compliance.
Table 2 indicates the substantial variation in revenue recovery between schemes [20].
We used these industries because of their relatively high return rates and the substantial variation in their e-retailers' delivery package designs.
The substantial variation of de-agrarianisation that exists amongst and between regions and homesteads, and in time and space, means that general patterns cannot be easily established.
Our analysis illustrates how the substantial variation in ranking criteria produces not only necessarily partial but also very specific global geographies of higher education.
The substantial variation we show across the site has implications for carbon accounting practices and cost-benefit analyses guiding investment and regulation of the sector.
Hence, due to the substantial variation of α with D50, no absolute α value is applicable to all hydraulic and sedimentary conditions.
The group concluded that the substantial variation in their results for bridges of the same type could be addressed by integrating more factors within their initial model: Student C: Our calculations are correct.
The lack of consensus estimates across studies from different countries is not really a mystery, given the substantial variation in UI-systems and other institutional features, e.g., related to disability insurance programs.
We did not perform meta-analyses as the substantial variation in study characteristics and applied diffusion-weighted imaging parameters of the reviewed studies prevented meaningful pooling of the data.
Given the complexity of clinical work and the substantial variation we can expect in an individual's desire to make his or her personal medical details available, it is unlikely a "one size fits all" approach to e-Consent will work.
