"not clearly apparent" is an acceptable phrase to use in written English.
You can use it to describe something that is not obvious or easily understood. For example: "The author's intent was not clearly apparent in the essay."
Because anatomy and gender identity can be complicated — some people are born with both male and female anatomical characteristics — and the root of athletic ability is not clearly apparent, there is broad disagreement over what criteria, if any, are most fair and effective in segregating sexes for competition.
However, the explanation of how and why Korea accomplished these things is not clearly apparent from a review of mainstream scholarship.
What was not clearly apparent at the time was that 1974 was one of the best times ever to be buying small-caps.
Contrary to the findings in Tables 1, 2, 3 and 4 on public credit registries, the marginal, threshold, and net effects of private credit bureaus in Tables 5, 6, 7 and 8 are not clearly apparent.
For many health problems the culprit is not clearly apparent.
Unlike most reported morphant phenotypes, the col27a1a and col27a1b morphant phenotype is not clearly apparent until the morpholino is no longer active.
Since those early days, seventy years or so ago now, a number of philosophers of science based in Latin America, often in uncooperative environments, have nonetheless managed to produce work of the highest international standards (something not so clearly apparent in the developing world in other branches of international philosophy).
The P28 peak is not as clearly apparent in the library constructed from the immunoprecipitate of the Mili protein (Additional file 4B).
Differences between males and females not only become clearly apparent post-puberty in response to increasing circulating hormone levels but are also present at a much younger age.
Merging the images demonstrated considerable co-localization of the proteins, although this was not absolute – single color puncta were also clearly apparent in most cells.
Indeed, even among SNARE longins from the same organism - e.g. yeast - the intramolecular binding mechanism can be either clearly apparent (Ykt6p [ 12]) or not detected (Nyv1p [ 45]).
