The phrase 'not clearly described' is correct and usable in written English.
You can use this phrase when referring to something that has been described or explained in a vague or incomplete way. For example, "His explanation of the plan was not clearly described, so I still had some questions about it."
However, the switch mechanism is not clearly described.
RNAi was not clearly described until the late 1990s, but research has moved rapidly.
While various scenarios have been proposed for this purpose, their rationality and assumptions are not clearly described because they are just documents referring some simulation results.
But in a series of recent interviews, several senior career officials at the F.B.I. said it would be a serious mistake to weaken the guidelines, and they were upset that the department had not clearly described the proposed changes.
● The population was not clearly described, and the spectrum of patients was distorted.
However, in the majority of studies, changes in medications and pain area throughout the study were not clearly described.
In case data were lacking or not clearly described in the original paper the authors were approached to supply the raw data.
Overall, the literature about the effect of neurosurgical treatment in the acute management of TBII is scarce, and the prognostic effect is not clearly described.
Moreover, the input parameter in [7] is r instead of θ. (3) The mean formula of tangent and cotangent function nodes [7] is not clearly described.
Larger surface area of 305 m2 · g−1 was achieved by Goswami et al., in which the use for drug delivery was emphasized and synthetic details were not clearly described [22].
The 2011 jerk described by Chulliat and Maus (2014) from northern African and French Guyana data is not clearly described by one rapid change of SV trend in the southern African region.
