The phrase "are not sufficiently explained" is correct and usable in written English.
You can use it when discussing topics, concepts, or details that lack adequate clarification or elaboration.
Example: "The findings of the study are not sufficiently explained, leaving readers with many unanswered questions."
Alternatives: "are not adequately clarified" or "lack sufficient explanation".
Ms. Lawal's lawyer, Aliyu Musa Yawuri, plans to raise some technicalities in his appeal: the charges were not sufficiently explained to Ms. Lawal, she did not understand the consequences of a confession.
On economics, for example, we have so far heard almost nothing that really progresses the ideas outlined last summer, and they were not sufficiently explained then as a plan people could relate to (and I say that as someone who wrote much of them, but not in the form or combination in which they were used).
The influence of ceftiofur on the immune response in vivo is not sufficiently explained to date and has not yet been investigated in pigs.
Preliminary data indicate that the higher stability of TTR tetramers in plasma is not sufficiently explained by molecular crowding, as crowding only modestly stabilizes TTR.
Although there is a large inter-individual heterogeneity with intestinal CYP3A4 expression and activity, the mechanism driving these differences is not sufficiently explained by genetic variability of PXR or CYP3A4.
Numerous risk factors such as diabetes, hypertension, and atherosclerosis have been recognized to increase susceptibility to stroke; however, the epidemiology of ischemic stroke is not sufficiently explained by the prevalence of these cerebrovascular risk factors [ 2].
Some critics argue that Grice's maxims are not sufficiently worked out to explain many of the phenomena related to implicature.
In the case of iPTF14hls, radioactivity can be ruled out because the isotopes that have the correct lifetime to explain the emission are not sufficiently abundant in the explosion.
Now that the effects of public stimulus packages around the globe are fading, fiscal policies are not sufficiently focused on job growth, which helps explain the likely delay in improving employment, the report said.
This inconsistency may arise from the fact that the simulations that explain the trapping behavior are not sufficiently described.
